두둔해요 · 두둔했어요 · 두둔할 거예요 · 두둔하세요
to take someone's side, to stick up for, to defend (often unfairly)
Example
아버지는 늘 막내만 두둔해서 형이 서운해했어요.
Dad always took the youngest's side, so the older brother felt hurt.
Word parts
Its syllables don't help; think of it as 'covering for' someone.
Good to know
Often implies biased defense of someone at fault, unlike principled 옹호하다.