머리 meori - head 
My favorite word that I recently learned is fish. Why? Because it translates to water meat lol. I really hope it was intentional.
물고기 (mulgogi) - fish
물 (mul) - water
고기 (gogi) - meat
wow I never though about it this way this is really  멋지다  "cool"
Yeah, I love how literal Korean is, 
불고기 (bulgogi) - Korean BBQ (literally fire meat)
불 (bul) - fire
고기 (gogi) - meat 
XD
Yes, that's what makes learning it fun. :D

제발 좀 꺼져 (please go away) 
미안해 (I'm sorry) 
사랑해 (I love you)
용서해 (forgive me)

All informal (반말) 

PS: These are lyrics from I Need You - BTS ♥
ehh i'll just consider 용서해 to be the last word ok? most finished with 해 anyway :P

해변 (hae-byeon): beach
Oh my bad, I forgot the rules while reading the comments xD

변호사 (lawyer )
사랑 (sarang, ''love'' ofcourse ^^)
I don't know a word that starts with 랑 lol 

사진 (picture)
구연하다 = narrate (orally) recite