think nothing of it

: to form or have in the mind

: to have as an intention

: to have as an opinion

: an act of thinking

: relating to, requiring, or stimulating thinking

: not any thing : no thing

: no part

: one of no interest, value, or consequence

: not at all : in no degree

: something that does not exist

: the absence of all magnitude or quantity

: nothingness, nonexistence

: of no account : worthless