
Heck
Express Mildness
Used to soften a statement, sound less offensive than using harsh words.

Where the heck have you been?
Colloquial Emphasis
Add emphasis in casual conversation, not usual in formal contexts.

How the heck did you do that?
Express Frustration
Can indicate a speaker's frustration without being rude or vulgar.

I can't figure this out, what the heck!
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BlastCripesDangDarnDratFudgeHellShoot
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