IPA: /ˈbeɪlfəl/
KK: /ˈbeɪlfəl/
Having a harmful or threatening effect; suggesting something bad will happen.
The baleful glare of the storm clouds made everyone uneasy.
Baleful is formed from "bale" (from Old English "bælg", meaning evil or harm) and "-ful" (meaning full of). The word "baleful" means full of harm or threatening evil.
Think of 'bale' meaning harm, and remember that 'baleful' describes something that is full of harm or threatening.