"devastating" in the verb sense
1. lay waste to, waste, devastate, desolate, ravage, scourge
cause extensive destruction or ruin utterly
"The enemy lay waste to the countryside after the invasion"
2. devastate
overwhelm or overpower
"He was devastated by his grief when his son died"
"devastating" in the adjective sense
1. annihilating, devastating, withering
making light of
"afire with annihilating invective"
"a devastating portrait of human folly"
"to compliments inflated I've a withering reply"- W.S.Gilbert
2. annihilative, annihilating, devastating, withering
wreaking or capable of wreaking complete destruction
"possessing annihilative power"
"a devastating hurricane"
"the guns opened a withering fire"
3. crushing, devastating
physically or spiritually devastating often used in combination
"a crushing blow"
"a crushing rejection"
"bone-crushing"
Source: WordNet® (An amazing lexical database of English)
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