Here are some words that you sometimes hear in anime.
ahoge - the hair that sticks out on a character
ai - love
akuma - devil
arigatou - thank you
baka - stupid, idiot, dumb, etc.
chikara - power, strength
daijobu - okay
dame - bad, no good; no can do
gaki - young, immature person
gomenasai - I'm sorry!
hen - strange, weird
hime -princess
ii - good
itai -hurt, pain
jigoku - hell
kami-sama - God
kareshi - boyfriend
kawaii - cute
kokoro - heart
korosu - to kill
kowai - scary, afraid
mahou - magic, magic spell
nani - what?
neko - cat
ohayou, ohayou gozaimasu - good morning
shinu - to die
suki - affection, liking
teki - enemy
tomodachi - friend
wakaru - to understand