깎아내려요 · 깎아내렸어요 · 깎아내릴 거예요 · 깎아내리세요
to belittle, to disparage, to run down
Example
남의 노력을 깎아내리는 말은 하지 마세요.
Don't say things that belittle other people's efforts.
Word parts
깎다 'to shave, cut' + 내리다 'to lower': shaving down someone's worth.
Good to know
Its opposite is 치켜세우다 'to praise to the skies' — one lowers, the other raises.