English → French
tactless /BrE ˈtaktləs 
, AmE ˈtæk(t)ləs /
adjective
[person, suggestion, attitude, behaviour] peu délicat; [question, enquiry] indiscret/indiscrète; [reply, words] peu diplomatique
it was tactless of him/her to do c'était indélicat de sa part de faire