adjective, scar·i·er, scar·i·est.
- causing fright or alarm.
- easily frightened; timid.
adjective scarier or scariest informal
- causing fear or alarm; frightening
- easily roused to fear; timid
adj.also scarey, “terrifying,” 1580s, from scare (n.) + -y (2). Meaning “easily frightened, subject to scares” is from 1800. Related: Scarier; scariest.