apropos
/ˌæp.ɹəˈpoʊ/
adjective
-
Of an appropriate or pertinent nature.
-
By the way, incidental
Synonyms:
by the way, incidental, incidentally
adverb
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By the way.
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Timely; at a good time.
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To the purpose; appropriately.
preposition
-
Regarding or concerning.
Synonyms:
about, as for
Antonyms:
malapropos