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Should

/ʃud/

Used to indicate obligation, duty, or correctness, typically when criticizing someone's actions; also used to indicate a conditional situation

Synonyms:

You know how sorry we should be.'You should not accept a hundred,' said Poirot.That should get at least a mild chuckle.

Originating from Old English sceolde, past tense of sculan meaning to be obliged to or must.

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