עָלַץ

From LSJ

ἀκμὴ οὐδὲ ἔχει γενέσεως ὑπόστασιν καθ' ἑαυτήν → the culmination has no power of originating by itself

Source

English (Strong)

a primitive root; to jump for joy, i.e. exult: be joyful, rejoice, triumph.