Pertinent

adj.thoughtful, capableprofessional

What it means

Directly relevant to the matter being considered.

Reach for it when praising information or questions that help resolve the actual issue

The mechanic asked one pertinent question about when the vibration began.

playful
on point
when informal praise should stress exact relevance
not when Its conversational tone is wrong for formal analysis or a solemn inquiry.
everyday
useful
when practical value matters more than topical connection
not when Useful advice may be general rather than pertinent to the question.
warm
timely
when relevance is strengthened by arriving at the right moment
not when Timely information can concern a different issue entirely.
professional
material
when a fact could affect a decision or legal outcome
not when Material has a specialized legal sense and is awkward for ordinary conversation.
professional
relevant
when information bears directly on the topic
not when Relevant material may still be too broad to be useful at this moment.
formal
applicable
when a rule or lesson can be used in the current case
not when Applicable concerns use, not whether a comment advances the discussion.
formal
germane
when close logical connection deserves precise wording
not when The uncommon word can sound showy in plain guidance.
literary
apt
when a remark or example fits especially well
not when Apt adds elegance or cleverness beyond mere relevance.

pertinent question
One pertinent question revealed that the two teams were using different dates.
pertinent information
Please include only pertinent information in the emergency handover.
directly pertinent
The earlier inspection was directly pertinent to the new safety concern.
pertinent detail
One pertinent detail connected the two apparently separate failures.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.