12 letters · 22 points in Scrabble
adjective quick to understand; - Nathaniel Hawthorne
adjective mentally upset over possible misfortune or danger etc
adjective in fear or dread of possible evil or harm
originFrom Latin apprehensīvus, from apprehensus, perfect passive participle of apprehendō (“to apprehend, understand, learn”) + -īvus (“-ive”).
Etymology from Wiktionary, CC BY-SA 3.0