like: hết sức lo ngại
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Composite Words Listening Comprehension Oxford Topics Duolingo Topics 315 Activities
BEGINNER LEVEL
exact:
VNEN 
hết sức lo ngại * ☊ 
to be extremely worried, concerned * ☊
[ hết ] : finished, exhausted, finish, exhaust; completely, totally, all, of all, everything
[ sức ] : force, strength, might, power
[ lo ] : (1) worried, anxious, afraid; to worry, fear, frighten; (2) to care about, look after
[ ngại ] : to worry, fear, be troubled by; worried, hesitant, fearful
[ lo ] : worry