huīshǒu
ㄏㄨㄟ ㄕㄡˇ
Simplified 挥手
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
湯姆揮手了。
Tāngmǔ huīshǒu le
Tom waved.
Keep 揮手 and it comes back until you know it.