なくして
- 1States a general truth that without X, Y cannot happen or exist.Ex. 1
- 2Looks back and says that without X, a result would not have been possible, often to express gratitude.Ex. 2
Verb (dictionary form)The basic form of a verb, as listed in a dictionary (non-past, affirmative).
行く・食べる・する・来る
Narrower than the plain form, which also covers 行かない・行った・行かなかった.
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A formal, written-style expression used in speeches, essays, editorials and formal thanks. It usually takes abstract nouns such as 努力, 協力, 愛 or 理解. The following clause is typically negative or expresses impossibility (ない, 不可能, できない). It sounds more literary and emphatic than なしに or the conversational 〜ないことには.
Do not follow なくして with a positive or neutral result; the second clause should express something impossible or not achievable.
Learners should not attach なくして directly to a verb; use 動詞辞書形 + ことなくして instead.
Note that なくして is stiff and literary, so it sounds unnatural in casual conversation.
- 1.なくしてはN1「なくしては」 is 「なくして」 plus the particle 「は」, with the same meaning but stronger emphasis on the indispensable prerequisite and a heavier tone. It usually follows a noun, the following clause is negative or impossible, and the two are mostly interchangeable.
- 2.〜ないことにはN3「〜ないことには」 also means the following clause cannot hold without the prerequisite, and its following clause is likewise negative; however, it attaches to the verb's negative form, 「でない」, etc., is neutral in register, and is common in speech. 「なくして」 mainly attaches to nouns, is formal and written, and often carries an emotional nuance.
- 3.なしにN2「なしに」 is close to 「なくして」 and interchangeable when it means 'without the first item, the second is hard to achieve', with a more neutral register; it can also mean 'did something without doing...', as in 「断りなしに」, a usage 「なくして」 does not have.
- 4.ことなしにN1「ことなしに」 attaches to the dictionary form of verbs, while 「なくして」 mainly attaches to nouns (actions use 「ことなくして」). The two are similar in the sense 'without doing the first item, the second is hard to achieve'; 「ことなしに」 can also simply mean 'doing... without doing...', which 「なくして」 cannot.
- 5.あってのN1「あっての」 states positively that 'B exists only because of A', in the pattern 「AあってのBだ」, with nouns on both sides and a neutral register; 「なくして」 states negatively that 'without A it won't work', with a mostly negative following clause and a written-style flavor. The meanings are close, but you must restructure the sentence to swap them.
なくしては is the same pattern with は added for emphasis. 〜ないことには ("unless") attaches to verbs in casual speech, while なしに and ことなしに mean "without (doing)" but need not be followed by an impossible outcome. あっての frames the same idea positively: "Y exists only because of X."


