unaccountable

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

1. not to be accounted for or explained (Freq. 1)
- perceptible only as unaccountable influences that hinder progress
- an unexplainable fear
• Syn:
unexplainable
• Similar to:
inexplicable, incomprehensible
2. free from control or responsibility
• Similar to:
irresponsible