'at all' definitions:

Definition of 'at all'

adverb

In the slightest degree or in any respect; "Are you at all interested? No, not at all"; "was not in the least unfriendly" [syn: at all, in the least, the least bit]

Synonyms of 'at all'

From: Moby Thesaurus

anyhow,
anyway,
anywise,
at any cost,
at any rate,
by any chance,
by any means,
by merest chance,
ever,
however,
if at all,
in any case,
in any event,
in any way,
irregardless,
nevertheless,
nohow,
nonetheless,
of any description,
of any kind,
regardless,
soever,
whatever,
whatsoever