How to say "No" in Japanese

When translating "no" into Japanese, you must choose carefully between 禁煙 and いや. In Japanese, 禁煙 (きんえん (kin'en)) is typically associated with "no smoking, non-smoking" (Syllabus Level: N4) and represents Commonly seen on signs in public places. On the other hand, いや (いや (iya)) maps to "no; unpleasant; reluctant; disagreeable" (Syllabus Level: N3) and represents A direct and somewhat informal way to say "no" or express refusal. Can also mean "unpleasant" or "disagreeable." Often used to express strong negative feeling or rejection.. A literal translation of "no" can often sound unnatural to native Japanese speakers if mixed up!