taru-adjective, adverb taking the 'to' particle
Describes a person or attitude that is above worldly concerns, standing apart from others in a calm, uninvolved way. Often used in literary or formal contexts.
He remains aloof from public opinion.
超然たる態度で議論を見守った。
He watched the debate with a detached attitude.
non-partisan cabinet
From 超 (transcend) + 然 (like, in the manner of), literally 'transcendent-like'. The exact historical derivation is uncertain, but the word has been used in literary Japanese to describe a lofty, detached state.