adverb
simply because; on account of
Expresses that a preceding reason or cause led to an undesirable or unexpected result. Often carries a nuance of regret or criticism. Used with verbs, adjectives, and nouns in the plain form.
彼の言葉を信じたばかりに、大変なことになった。
Simply because I believed his words, things turned out terribly.
ちょっとしたミスをしたばかりに、プロジェクト全体が遅れてしまった。
Just because I made a small mistake, the whole project got delayed.
adverb
as if to; about to
Indicates that someone appears to be on the verge of doing something, or that a situation seems about to happen. Often used with verbs in the dictionary form or ～んばかりに. Related to the ばかり form meaning 'just about to'.
See also: ばかり
彼女は泣き出さんばかりに、うつむいていた。
She hung her head as if she were about to burst into tears.
空は今にも雨
The sky darkened as if it were about to start raining at any moment.