To be busy
바쁘다
To be free (not busy)
한가하다
To be kind (friendly)
친절하다
To be unkind (unfriendly)
불친절하다
To be safe
안전하다
To be dangerous
위험하다
To be possible
가능하다
To be impossible
불가능하다
To be exactly the same
똑같다
To be insufficient
부족하다
To be sufficient
충분하다
To be complicated
복잡하다