This is the 170th most frequent Catalan word.
mica
A small amount; a little.
Here 'mica' is used with a negation to emphasize the degree of difficulty, conveying 'not at all'.
Aquest treball no és mica fàcil.
This task is not easy at all.
Here 'mica' is used to express a small amount of something in an affirmative context.
Ves amb compte; hi ha una mica d'aigua al terra.
Be careful; there is a little water on the floor.
Here 'mica' is used to express a small amount, often in a negative construction indicating none or nothing.