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Pronunciation varies by accent · adjective
Used other than figuratively or idiomatically: see four-letter: containing four letters..
a four-letter reply, a four-letter insult, a four-letter tirade
Use four-letter when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Four-letter means Used other than figuratively or idiomatically: see four-letter: containing four letters..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
a four-letter reply, a four-letter insult, a four-letter tirade
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