24
Two straight lines are supporting each other as the stable structure
protecting from outer power, representing certainty or solid.
(2本の直線が支えあった、確かさ・安定・固さを示す記号)

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( If you don't understand how to read this page, see here first )

the hand-shape-sign:
wide open downward the thumb and the extended four other fingers.
(the direction of the thumb is free, according to the position, whichever side can be the front)
(4本指はそろえて伸ばす。向きは自由)

the hand-movement-sign:

to draw the base shape, stopping for a moment on top to distinguish from 48.
(#48と見分けやすいよう、頂上でいったん止める)

name]: cho of choke without [u] in the vowel (チョ)

ASCII: V (the similar shape, but pointing up)

phonetic value: unused

definition (single): the situation of certain, firm (確か)

verb:

vi. (the subject) becomes firm (確かになる)
vt. make (something) sure or firm (確かにする)

main images in base overlays:

1) Related to stability/stable/firm things in nature (自然の確かなもの、安定に関連)
2) Related to a firm/hard/solid material or quality (硬さ、固いもの・質に関連)
3) Related to 'hard shell', but also each total shape represents its creature
(硬い殻の意味を加えると同時に文字全体が象形)
4) Artificially settled/settling matter (人為的な定め)
5) Relating to its shape (記号の形に関係)

examples of base overlay:

Related to stability/stable/firm things in nature (自然の確かなもの、安定に関連)

{10(place),24}: land(土地)
{10,24,20(out)}: peninsula (半島)
{10,24,38(artificial)}: artificial land (人造地)
{10,24,35(continuous)}: continent (大陸)
{{04,31}(horizontal),{10,24}(land)}}: plain (geographical sense) (平原)
{10,24,11(end)}: coast, shore (岸)
{10,24,50(object)}: land as real estate (物件としての土地)
{10,24,{41,42}(shaking)}: earthquake (地震)
{24,42(wave)}: also the total shape is like an island: island (象形でもあり、島)

{24,66(plant)}: root (根)
{02,14,{24(stable),66(plant)}root}: root hair (of plant) (根毛)

{51(power),24}: bone (骨)
{{51,24},{34,54}( head )}: skull (頭蓋骨)
{{51,24},05(no)}: bone-less (骨なし)
{{51,24},02(for the shape),62(back)}: backbone/spine (背骨)
{{51,24},26(compounded)}: structure (構造)

{02(one),24}: uniform, constant (ad.) (一定)
{40(balance),24}: order (秩序)
{{10,56} social, {24,40}rule/order: government (行政)
{, 09 matter}: politics (政治)
{05(not),24}: uncertain (不確定な)
{37(nature),24}: natural order (自然の定め)

Related to a firm/hard/solid material or quality (硬さ、固いもの・質に関連)

{37(nature),35(continue),24}: rock (岩)
{16(grains),{37,35,24}(rock)}: sand (砂)
{24,29(material)}: metal (金属)
{{20(out-going),{23,33}color}(yellow),{24,29}( metal )}: gold, golden (金、金の)
{24,59(water)}: ice(氷)
{05(not),24,59}: unfrozen liquid (不凍液)
{06(opposite),24,59}: thawing, thaw (vi. with gd / vt. with ge) (解凍)
{{37,59}(rain),24}: snow (雪)
{28(surface)37,59,24}: frost (霜)
{06(opposite),24}: unrestricted, flexible (柔)
{24,50(material)}: solid (n.) (固体)
{24,31(form)}: solid (ad.), become solid( vi. with gd ) (固まった)
{24,31,05(not)}: not harden (固まらない)
{24,31,06(opposite): crumble/ break up (vi. with gd ) (くずれ)
{{24,31}(solid),{07,08}(degree)}}: degree of hardness( of a solid thing, not the meaning of difficulty ) (硬度)
{07(much),{24,31}}: rigid (堅くて曲がらない)
{08(little),{24,31}}: brittle, fragile (もろい)
{41( move),{24,31}}: flexible like a rubber (柔軟)
{63(weak),{24,31}}: soft (やわらか)
{24,31,64(very)}: hard, firm, harden (vt. with ge) (硬い)
{{04,39}(mouth),24}: beaks (くちばし)
{12(friction),24}: tooth/teeth (as a fundamental character), chew (v. with gd) (歯、D動詞:噛む)
{{12,24},64(violent)}: fang/tusk (牙)
{{33,41}rotating, 12,24 teeth}: gear (歯車)
{{68(heart),49(nature, quality)} (personality ),24}: stubborn(頑固)

Related to 'hard shell', but also each total shape represents its creature
(硬い殻の意味を加えると同時に文字全体が象形)

{67( life ),24}: shell/carapace (殻)
{67,24,41( move )}: shellfish (貝)
{,66,45,24}: crustacean (甲殻類)
{+ {17,18}vertical}: shrimp/prawn/lobster (エビ)
{+ {19,20}horizontal}: crab (蟹)

Artificially settled/settling matter (人為的な定め)

{09affair,24}: regulation, rule, rule (v. with gd) (規定)
{22(origin),24}: foundation, be founded/be established (v. with gd) (基礎)
{45(relation),24}: organization, organized (組織)
{14way,24}: rule (規則)
{14,24,26(gathering)}: law (法律)
{{48,25}security, 24(related to law),46}: police (as an official organization)
{{48,25}security, 24(related to law),10place}: police station
{{48,25}security, 24(related to law),56occupation}: police officer
{58(possibility),14,24}: right (to do) as law (権利)
{56(action),14,24}: duty as law (義務)
{{15,33}language,14,24}: grammar (文法)
{15(recognition),24}: judgment, judge (判断)
{47(vessel),15,24}: measure cup (計量器)
{24certain,30indication}: proof/certification (証明)
{24.30,65person}: witness (証人)
{24,38(make)}: decision (決定)
{24,54(existence)}: settlement, settle (v, with gd) (定住)
{01,24}:(fixed/settled point): fixed point (定点)
{11(limited),24}: particular (特定)
{58(possible),11,24}: patent (特許)
{13(same),24}: league, confederacy, alliance (同盟)
{25(join),24}: promise (約束)
{{25,24}promiss for 61 front/later}: reservation (予約)
{47(accepted),24}: pledge, oath (誓い)
{{48,69}(clothes),24}: uniform to wear (ユニホーム)
{50(goods),{34,38}(money),24}: fixed price (定価)
{{36,70}(term, period),24}: fixed term (定期間)
{{36,30}(specific time),24}: scheduled time (定刻)
{{36,33}(frequency),24}: periodic (定期的)
{{34,65}(member),24}: regular member (常連)
{10(place),24,32(basic unit)}: country (国)
{10,24,16(parts),32(basic unit)}: state/a unit part of a country (州、県)
{10,24,32, 16, 08(smaller)}: smaller unit/units of the above matter: county/district (郡)
{{34,68}(value),24}: treasure (宝)
{68(heart),24}: determination, resolve (personal than ) (決心)

Relating to its shape (記号の形に関係)

{33,24,31(shape)}: (a) cone/ conic (by the shape combined 33 and 24)(円錐)
{28, 24,31}: pyramid (四角錘)

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