やしない
- 1Emphatically denies that someone will do something or that something will happen, often dismissively.Ex. 1
- 2With potential verbs such as できる, emphatically denies that something is possible.Ex. 2
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Used in casual speech to strongly deny something, often with irritation or contempt toward the person or situation. It stresses a flat "not at all" and is common with なんか or そんな. It denies the action or its possibility more forcefully than plain ない, but is less fixed on impossibility than っこない.
Do not use やしない in formal writing or polite business situations, because it sounds blunt and emotional.
Learners should attach やしない to the verb ます-stem, not to the dictionary form or the ない-form.
Note that や here is an emphatic particle that intensifies the negative, not the listing particle や meaning "and".
- っこないN2「っこない」also attaches to the ます形 and is casual spoken language; when it expresses “utterly impossible,” it is basically interchangeable with 「やしない」. However, 「っこない」often attaches to potential verbs, does not necessarily carry displeasure, and can also express trust, as in 「彼女が嘘をつきっこない」.
- ものかN2「ものか」attaches to the 辞書形 and た形, and can also attach to adjectives and nouns; it expresses negation as a rhetorical question, often the speaker’s own “never…”. When negating possibility it is close to 「やしない」, as in 「できるものか」≈「できやしない」.
- もしないでN1「もしないで」also attaches to the ます形, but it must be followed by a second clause and means “without even doing…,” reproaching the lack of even the most basic step; 「やしない」, by contrast, strongly negates intention or possibility. The two cannot be interchanged, and 「もしないで」is neutral in register.
- まいN2「まい」expresses negative volition (“never…”) or negative conjecture (“probably won’t…”), attaching to the 辞書形 and similar forms, with a formal, literary tone. 「やしない」attaches to the ます形 and is a colloquial emphatic negation with displeasure or contempt, so the two should not be interchanged.
- でも何でもないN1「でも何でもない」attaches to nouns and な形容詞 (with い形容詞, use 「くも何ともない」) and denies “being A” itself; 「やしない」attaches to the ます形 of verbs and negates actions or possibility. Their attachment differs, so they cannot be interchanged.
っこない attaches to the ます-stem and focuses on impossibility, while やしない flatly denies the action itself; ものか follows the dictionary form and expresses the speaker's defiant refusal. まい is a more written negative of intention or conjecture, もしないで means "without even doing", and でも何でもない denies a noun or な-adjective label ("not X at all").
