"pertinent" in the adjective sense
1. pertinent
having precise or logical relevance to the matter at hand
"a list of articles pertinent to the discussion"
"remarks that were to the point"
2. apposite, apt, pertinent
being of striking appropriateness and pertinence
"the successful copywriter is a master of apposite and evocative verbal images"
"an apt reply"
Source: WordNet® (An amazing lexical database of English)
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