Il mène grand train = He lives like a lord.
À fond de train = At full speed.
Trait
Ce que vous dites n’a pas trait à la question = What you say has nothing to do with the question.
Ce sont là de vos traits = That is just like you.
Avaler d’un trait = To drink off at one gulp, at a draught.
Traite
Tout d’une traite = At a stretch, without stopping.
Traiter
Il m’a traité de fat = He called me a fop.