preposition

With reference to; concerning.

she remarked apropos of the initiative, “It’s not going to stop the abuse.”

with reference to,with regard to,with respect to,regarding,concerning,respecting,on the subject of,in the matter of,touching on,dealing with,connected with,in connection with,about,re

adjective

Very appropriate to a particular situation.

the composer’s reference to child’s play is apropos

appropriate,pertinent,relevant,apposite,apt,applicable,suitable,germane,material,becoming,befitting,significant,to the point,to the purpose