suru verb (special), intransitive verb
be hesitant; feel timid; shrink back
Describes a mental state of hesitation or timidity, often in the face of a challenge or social situation. Used with する as a suru verb.
彼は大勢の前で話すのに臆する。
He feels timid about speaking in front of a large audience.
臆することなく自分の
I stated my opinion without hesitation.