thwack Thuyopsis • thwacker · · · Info · Definitions · Synonyms · Characters · · thwack · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a hard blow with a flat object. · · Noun Definition 1 (verb) deliver a hard blow to. Synonyms: smack. Example: "The teacher smacked the student who had misbehaved." · · Verb Definition 1 Synonyms · · · smack · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 h latin small letter h U+0068 k latin small letter k U+006B t latin small letter t U+0074 w latin small letter w U+0077