Attentive
来自Big Physics
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late Middle English: from Old French attentif, -ive, from atendre ‘give one's attention to’ (see attend).
wiktionary
From Middle English attentif, attentijf, from Old French attentif.
etymonline
attentive (adj.)
late 14c., "heedful, observant" (implied in attentively), from Old French atentif "expectant, hopeful," from past-participle stem of Latin attendere "give heed to" (see attend). Sense of "actively ministering to the needs and wants" (of another person) is from early 16c.