Leaping
noun, する verb
To fly and leap is leaping.
ひやく
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
彼は陰謀論が好きなんですが、彼の論理はよく飛躍するんですよね。
He likes conspiracies, but there is often a leap in his logic.