Denshi Jisho — Online Japanese dictionary

口 く 1:
2: (Buddhist term) mouth; speech; () counter for people or implements
Noun 
口 くち 1: mouth;
2: opening; hole; gap; orifice;
3: mouth (of a bottle); spout; nozzle; mouthpiece;
4: gate; door; entrance; exit;
5: speaking; speech; talk (i.e. gossip);
6: taste; palate;
7: mouth (to feed);
8: opening (i.e. vacancy); available position;
9: invitation; summons;
10: kind; sort; type;
11: opening (i.e. beginning);
12: () counter for mouthfuls, shares (of money), and swords
Common word, Noun 
口 こう counter for people or implements
Suffix, Counter 
河口 かこう mouth of river; estuary
Common word, Noun, No-adjective 
小口 こぐち 1: cut end; edge (of a page, etc.);
2: small amount; small sum;
3: beginning; clue;
4: tiger's den; jaws of death; dangerous place
Common word, Noun 
手口 てぐち modus operandi; criminal technique; trick
Common word, Noun 
出口 でぐち exit; gateway; way out; outlet; leak; vent
Common word, Noun 
戸口 とぐち door; doorway
Common word, Noun 
火口 ひぐち a burner; origin of a fire
Common word, Noun 
間口 まぐち frontage
Common word, Noun 
無口 むくち reticence; taciturnity
Common word, Na-adjective, Noun, No-adjective 
利口 りこう clever; shrewd; bright; sharp; wise; intelligent
Common word, Na-adjective, Noun 
火口 かこう crater; caldera
Noun 
木口 きぐち 1: grade of wood; quality of wood;
2: cut end (of a piece of wood)
Noun 
戸口 ここう houses and inhabitants; population
Noun 
糊口 ここう bare livelihood; subsistence
Noun 
虎口 ここう tiger's den; jaws of death; dangerous place
Noun 
餬口 ここう bare livelihood; subsistence
Noun 
仕口 しくち method; way
Noun 
地口 じぐち pun; play on words
Noun 
兎口 すぐち harelip; cleft lip
Noun, Obscure term 
猪口 ちょこ small cup; sake cup
Noun, Usually written using kana alone 
鼻口 びこう 1: nose and mouth; muzzle (e.g. of a dog);
2: nostril; nostrils; naris; nares
Noun, No-adjective 
湯口 ゆぐち hot-water tap; hot spring
Noun 
秋口 あきぐち beginning of autumn; beginning of fall
Common word, Noun 
悪口 あっこう abuse; insult; slander; evil speaking; bad mouth
Common word, Noun, Suru verb 
糸口 いとぐち thread end; beginning; clue
Common word, Noun 

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