Thank

King James Dictionary

Thank,

1. To express gratitude for a favor to make acknowledgments to one for kindness bestowed.

We are bound to thank God always for you.  2 Thessalonians 1 .

Joab bowed himself and thanked the king.  2 Samuel 14

2. It is used ironically.

Weigh the danger with the doubtful bliss,

And thank yourself, if aught should fall amiss.

Thank

Webster's Dictionary

(1): ( n.) A expression of gratitude; an acknowledgment expressive of a sense of favor or kindness received; obligation, claim, or desert, or gratitude; - now generally used in the plural.

(2): ( n.) To express gratitude to (anyone) for a favor; to make acknowledgments to (anyone) for kindness bestowed; - used also ironically for blame.