bottle up

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bottle up (third-person singular simple present bottles up, present participle bottling up, simple past and past participle bottled up)

1. (transitive) To put into bottles.
2. (transitive) To prevent (enemy vessels) from leaving an anchorage.
3. (transitive, idiomatic) To keep suppressed and hidden.

   Emotions are often bottled up rather than dealt with, which can lead to stress in later life.