· jolly
· jovial
· joyful
· joyous
· jubilant
· kind
· kindhearted
· kindly
· klutzy
· knobby
· kindhearted
· neighborly
* knowledgeable * lazy
There are no adjectives that begin with the letter k that mean to be thankful.
jitterykindheartedmagnificentnaughtyoptimisticquestionableunderstandingwisexenophobiczesty
Kaki
* kind
kaleidoscopic
KOOL
kiddy
· knowledgeable
* knowledgeable
· kind
kinship
kiddy