apropos
adj. C2 Proficiency US //ˌæpɹəˈpoʊ// UK //ˌæpɹəpˈəʊ// apro·pos
adj. describing something that is very suitable or appropriate for the situation. It is a formal way to say that something fits perfectly.
adj. suitable, relevant, or appropriate to the circumstances. Often used in the phrase 'apropos of nothing' to indicate a sudden, unrelated topic change.
The speaker's comment was apropos of the current debate.
The manager's suggestion was apropos of the new safety regulations we are discussing today.
The author's final chapter is apropos of the entire narrative, tying together the various thematic threads that had been introduced in the earlier chapters.
Borrowed from French à propos (“on that subject”). Similar in meaning and form, and to some extent etymology, to appropriate, but not a doublet of it.