There are no adjectives that begin with the letter k that mean to be thankful.
affection
lazy
mightymammothmarvelous
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.
Merciful is the best I can do for love, care and hope. It begins with the letter m.
meaner (comparative form of mean)messier (comparative form of messy)
Overconfident beans unreasonably confident. Obscure means hidden, concealed or dubious.
* kindhearted
Maddening, malicious, materialistic, mean, meek, merciful, messy, meticulous, modest, moody and mopey are adjectives. They begin with the letter m.
hurtful