くの字の矢印 (角丸・左向き)のアイコン

<span class="dli-chevron-round-left"></span>

.dli-chevron-round-left {
  display: inline-block;
  vertical-align: middle;
  color: #333;
  line-height: 1;
  position: relative;
  width: 1em;
  height: 1em;
  transform: translateX(25%) rotate(-135deg);
}

.dli-chevron-round-left::before, .dli-chevron-round-left::after {
  content: '';
  position: absolute;
  background: currentColor;
  border-radius: 0.1em;
}

.dli-chevron-round-left::before {
  top: 0;
  left: 0;
  right: 0;
  height: 0.1em;
}

.dli-chevron-round-left::after {
  top: 0;
  right: 0;
  bottom: 0;
  width: 0.1em;
}