bleakly
boiling
boughs
dread (noun)
gritty
smothered
stifling
stray (verb)
sweltering
swiftly
trigger
utterly still

Adjective Suffixes

-al
-ed
-ous
-ent
-ful
-ic
-able
-ing
-ive
-ent

exhausted
frantic
harsh
insistent
overwhelming
painful
peaceful
restful
stifling
sweltering
tedious
terrifying
unendurable
vast
wondrous