taoiseach

Etymology
See.

Noun

 * 1)  A chieftain or leader.

Usage notes
Early attestations of (“chieftain or leader”) in English texts are often uses of the Irish word.

Etymology
From, from , from (compare 🇨🇬), from  (from  +  (ultimately from either  or )) +.

Noun

 * 1) chieftain, leader
 * 2) Taoiseach, prime minister