Insightful
来自Big Physics
Middle English (in the sense ‘inner sight, wisdom’): probably of Scandinavian and Low German origin and related to Swedish insikt, Danish indsigt, Dutch inzicht, and German Einsicht .
wiktionary
insight + -ful
etymonline
insightful (adj.)
"with penetrating understanding into character or hidden nature," 1881, from insight + -ful. Some earlier words in the same sense were insighted (c. 1600), inseeing "having insight" (1590s). Related: Insightfully; insightfulness.
