forgetful

adjectives

(of memory) deficient in retentiveness or range

"a short memory"

forgetful, short, unretentive

is derived from

not mindful or attentive

"while thus unmindful of his steps he stumbled"- G.B.Shaw

forgetful, mindless, unmindful

is derived from

failing to keep in mind

"forgetful of her responsibilities"; "oblivious old age"

forgetful, oblivious

is derived from