Laughing is the most effective antidote to bad temper.
- Le rire est l'antidote le plus efficace à la mauvaise humeur.
He was, which was rare for him, in a bad temper.
- Il était, ce qui est rare chez lui, de mauvaise humeur.
He is rarely in a good mood.
- Il est rarement de bonne humeur.
His answer depends on his mood.
- Sa réponse dépend de son humeur.