Denshi Jisho — Online Japanese dictionary

素 そ 1: plain, white silk;
2: (Mathematical term) prime
Common word, Na-adjective, Noun, No-adjective 
素 す 1: plain; unadorned; undecorated; unadulterated; au naturel;
2: (Prefix) (Derogatory) (before a noun) mere; poor;
3: (before an adjective) exceedingly
No-adjective, Noun 
素 もと 1: origin; source;
2: base; basis; foundation; root;
3: cause;
4: ingredient; material;
5: original cost (or capital, principal, etc.);
6: (plant) root; (tree) trunk;
7: first section of a waka;
8: (Noun) handle (chopsticks, brush, etc.); grip
Noun 
素子 そし 1: element (esp. component in electronics); elemental device; device;
2: data; datum
Common word, Noun 
画素 がそ picture element; image pixel; PEL
Noun 
素地 きじ 1: cloth; material; texture;
2: one's true character;
3: unglazed pottery;
4: uncooked dough; batter
Noun 
語素 ごそ word root (the smallest portion of a larger word that holds meaning)
Noun 
素湯 さゆ (plain) hot water; boiled water
Noun 
緇素 しそ old term for Buddhist priesthood and the common people (since they used to wear black and white clothing respectively)
Noun 
素っ すっ most (emphasis); much; greatly
Prefix 
素手 すで unarmed; bare hands
Noun, No-adjective 
素志 そし longstanding desire or goal
Noun 
素地 そじ foundation
Noun 
ヒ素 ひそ arsenic (As)
Noun, No-adjective 
砒素 ひそ arsenic (As)
Noun, No-adjective 
塩素 えんそ chlorine (Cl)
Common word, Noun, No-adjective 
簡素 かんそ simplicity; plain
Common word, Na-adjective, Noun 
元素 げんそ chemical element
Common word, Noun, No-adjective 
酵素 こうそ enzyme
Common word, Noun, No-adjective 
酸素 さんそ oxygen
Common word, Noun, No-adjective 
色素 しきそ pigment; coloring; colouring
Common word, Noun, No-adjective 
質素 しっそ simplicity; modesty; frugality
Common word, Na-adjective, Noun 
水素 すいそ hydrogen
Common word, Noun 
素顔 すがお 1: face with no make-up; unpainted face;
2: honesty; frankness
Common word, Noun, Na-adjective, No-adjective 
素敵 すてき lovely; dreamy; beautiful; great; fantastic; superb; cool; capital
Common word, Ateji (phonetic) reading, Na-adjective 
素直 すなお 1: obedient; meek; docile; unaffected;
2: honest; frank; upfront (about one's feelings)
Common word, Na-adjective, Noun 

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