吹灰之力

a slight effort

to blow / to play a wind instrument / to blast / to puff / to boast / to brag / to end in failure / to fall through

to blow away dust

ash / dust / lime / gray / discouraged; dejected

(possessive particle, literary equivalent of 的[de5]) / him / her / it

power / force / strength / ability / strenuously

as easy as blowing off dust / effortless / with ease