Dad

Dad (dăd), n. [Prob. of Celtic origin; cf. Ir. daid, Gael. daidein, W. tad, OL. tata, Gr. τάτα, τέττα, Skr. tāta.] Father; — a word sometimes used by children.

I was never so bethumped with words,

Since I first called my brother's father dad. Shak.