Usage Note
Sucer means to suck (a sweet, a thumb, etc.) and is perfectly standard in those contexts. Sucer son pouce ('to suck one's thumb') is a common phrase for young children. Be aware that in informal French the word also carries a vulgar secondary sense, so context matters.
Examples
"Il suce un bonbon à la menthe."
Natural Translation
He is sucking a mint sweet.
Related Words
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