Strong’s Greek
G4640 — skirtao
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
σκιρτάω
skirtao — pronounced skeer-tah'-o
akin to skairo (to skip); to jump, i.e. sympathetically move (as the quickening of a fetus):--leap (for joy).
3 occurrences in the KJV.
Luke 1:41
And it came to pass, that, when Elisabeth heard the salutation of Mary, the babe leaped in her womb; and Elisabeth was filled with the Holy Ghost:
Luke 1:44
For, lo, as soon as the voice of thy salutation sounded in mine ears, the babe leaped in my womb for joy.
Luke 6:23
Rejoice ye in that day, and leap for joy: for, behold, your reward is great in heaven: for in the like manner did their fathers unto the prophets.