tactless
adjective
- awkward (destitute of tact)
Wiktionary
Pronunciation: /ˈtæktləs/
adj
Etymology: Etymology tree English tact Proto-Indo-European *lewh₁- Proto-Indo-European *lewHs-der. Proto-Germanic *leusaną Proto-Germanic *lausaz Proto-Germanic *-lausaz Proto-West Germanic *-laus Old English -lēas Middle English -les English -less English tactless From tact + -less.
- having no tact; unaware or intentionally inconsiderate of someone else's feelings
“It was tactless of you not to attend your sister's wedding.”