This is the 514th most frequent Turkish word.
acil
Urgent.
Here, 'acil' is used as an adjective meaning 'emergency' to describe a situation that requires immediate attention.
Acil bir durumda hemen 112'yi arayın.
In an emergency, immediately call 112.
In this sentence, 'acil' means 'urgent' and describes something requiring prompt action.
Bu, acil bir mesele; derhal çözmeliyiz.
This is an urgent matter; we must resolve it immediately.
In this case, 'acil' is used to denote seriousness and necessity for immediate action in a medical context.