relevant

Từ điển American Heritage Dictionary 4th

rel·e·vant (rĕlʹə-vənt)adj.
Having a bearing on or connection with the matter at hand. [Medieval Latin relevāns, relevant-, from Latin, present participle of relevāre, to relieve, raise up. See relieve.] relʹe·vant·ly adv. 
Synonyms: relevant, pertinent, germane, material, apposite, apropos
These adjectives describe what relates to and has a direct bearing on the matter at hand. Something relevant is connected with a subject or issue: performed experiments relevant to her research. Pertinent suggests a logical, precise relevance: assigned pertinent articles for the class to read. Germane implies close kinship and appropriateness: “He asks questions that are germane and central to the issue” (Marlin Fitzwater). Something material is not only relevant but also crucial to a matter: reiterated the material facts of the lawsuit. Apposite implies a striking appropriateness and pertinence: used apposite verbal images in the paper. Something apropos is both to the point and opportune: an apropos comment that concisely answered my question.