There are no adjectives that begin with the letter k that mean to be thankful.
affection
mightymammothmarvelous
lazy
quarrelsome
Meek, many and mean are adjectives for a 2nd grader. They begin with the letter m.
If you mean what adjective means 'dog-like' then 'canine' is the word.
Overconfident beans unreasonably confident. Obscure means hidden, concealed or dubious.
meaner (comparative form of mean)messier (comparative form of messy)
Merciful is the best I can do for love, care and hope. It begins with the letter m.
* kindhearted
hurtful
Maddening, malicious, materialistic, mean, meek, merciful, messy, meticulous, modest, moody and mopey are adjectives. They begin with the letter m.