増やす
ふやす · fuyasu · JLPT N3 · verb-godan
to increase
🐇 fu-ya-su ≈ few? Ya, so add more! It turns few into many
増 (zō, increase) also appears in 増加 zōka. The -やす ending marks the transitive form: you increase something. Its partner 増える (fueru) means something increases by itself.