underline-4

<svg viewBox="0 0 24 24" fill="currentColor" xmlns="http://www.w3.org/2000/svg"><path d="M5.995 2.994a.75.75 0 0 1 .75.75v7.5a5.25 5.25 0 1 0 10.5 0v-7.5a.75.75 0 0 1 1.5 0v7.5a6.75 6.75 0 1 1-13.5 0v-7.5a.75.75 0 0 1 .75-.75Zm-3 17.252a.75.75 0 0 1 .75-.75h16.5a.75.75 0 0 1 0 1.5h-16.5a.75.75 0 0 1-.75-.75Z" fill-rule="evenodd" clip-rule="evenodd"/></svg>

<i class="ti ti-underline-4"></i>

ti ti-underline-4

<i class="ti ti-026022"></i>

ti ti-026022

<svg aria-hidden="true" focusable="false" viewBox="0 0 24 24" fill="currentColor" xmlns="http://www.w3.org/2000/svg"><path d="M5.995 2.994a.75.75 0 0 1 .75.75v7.5a5.25 5.25 0 1 0 10.5 0v-7.5a.75.75 0 0 1 1.5 0v7.5a6.75 6.75 0 1 1-13.5 0v-7.5a.75.75 0 0 1 .75-.75Zm-3 17.252a.75.75 0 0 1 .75-.75h16.5a.75.75 0 0 1 0 1.5h-16.5a.75.75 0 0 1-.75-.75Z" fill-rule="evenodd" clip-rule="evenodd"/></svg>

<svg aria-hidden="true" focusable="false" viewBox="0 0 24 24" fill="currentColor" xmlns="http://www.w3.org/2000/svg"><path d="M5.995 2.994a.75.75 0 0 1 .75.75v7.5a5.25 5.25 0 1 0 10.5 0v-7.5a.75.75 0 0 1 1.5 0v7.5a6.75 6.75 0 1 1-13.5 0v-7.5a.75.75 0 0 1 .75-.75Zm-3 17.252a.75.75 0 0 1 .75-.75h16.5a.75.75 0 0 1 0 1.5h-16.5a.75.75 0 0 1-.75-.75Z" fill-rule="evenodd" clip-rule="evenodd"/></svg>

https://cdn.jsdelivr.net/npm/@ticnob/icons@1/icons/underline-4.svg