effete

这个曾经强大的帝国已经变得腐朽无能，无法应对新的挑战。

The once mighty empire has become ___effete and unable to meet new challenges.

他那过分文雅的举止显得娇弱无力，与艰苦的探险环境格格不入。

His ___effete demeanor seemed fragile and out of place in the rugged expedition.