To Shake
To Sway, To Tremble
intransitive verb, godan verb
Hey look! If you weren't sick of them yet, it's another verb that goes with shake! This one means to shake too!
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You learned this reading when you learned 揺る, 揺する, and 揺れる so I reeeeally hope you can remember it by now!
それっぽっちのことで、気持ちが揺らぐんだ。
So few things sway my feelings.