なるべく
なるべく · narubeku · JLPT N4 · adverb
if possible
naru (become) + beku (as ought to) = as far as it can become so
From classical Japanese: なる (to become, to come about) plus べく, a form of the old auxiliary べし (can, should). Literally 'so far as it can come about', which is why it means as much as possible or if possible.