A close antonym would be shrinkage.
enlarge
dearth, deficiency
plentiful
An antonym of the word learn is the word misunderstand.
Few. An antonym is a word that means the opposite.
Current or present is the closest antonym for the word former.
INSIGNIFICANT?
closed
conceited
Quiet
Clearness.
depressed
ineffective, ineffectual, unable, impuissant, Impotent
rejected.
allows
enlarge
tear apart