Denshi Jisho — Online Japanese dictionary

付く つく 1: to be attached; to be connected with; to adhere; to stick; to cling;
2: to remain imprinted; to scar; to stain; to dye;
3: to bear (fruit, interest, etc.);
4: to be acquired (of a habit, ability, etc.); to increase (of strength, etc.);
5: to take root;
6: to accompany; to attend; to follow; to study with;
7: to side with; to belong to;
8: to possess; to haunt;
9: to be lit; to be lighted;
10: to be settled; to be resolved; to be decided;
11: to be given (of a name, price, etc.);
12: to be sensed; to be perceived;
13: to be lucky;
14: () (after -masu stems, onomatopoeic and mimetic words) to become (a state, condition, etc.)
Godan verb with ku ending, Intransitive verb 
付く づく to become (a state, condition, etc.)
Suffix, Godan verb with ku ending 

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