Kuso, Kusso

Kuso or Kusso: (1) bullshit (2) damn (3) something dirty

糞 or 屎 -- int., expression, adj.

Hint: you usually heard this expression when the character felt annoyed and in bad situation.

Kuchi

Kuchi: (1) mouth (2) entrance (3) hole (4) gate

口 -- n.

Tips: aside from read as 'kuchi', it can also read as ku and kou. The kanji is very simple. Just imagine your mouth open and say 'oh'.

Kuni

kuni: (1) country (2) state (3) land

国 -- n.

Hints: there is a music score from Gintama called 'Koko wa Samurai no Kuni da', roughly translated as This is the Samurai's Land

-kun, kun

-kun: (1) a suffix added after male’s name in informal situation. also refer to (2) junior

~君

Notes: Usually uses by male to male or female to male where both are equal status (friends or lover). In some Japanese dramas, I heard the senior (of age or position) calls younger/lower position female with -kun in offices.

Also check kimi