Vividly Depicted, Clearly Expressed
adjective, adverb
A leap of likeness is when something that's not real takes a big leap towards the likeness to reality. This happens when something is vividly depicted or clearly expressed. This word is generally used in the phrase 面目躍如たる, which functions as an adjective to exemplify someone’s honor.
やくじょ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
そいつにチャンピオンの面目躍如たるところを見せつけてやれ！
Show him what kind of champion you are!