坑
kēng · HSK 7
hole
🕳️ 土 earth radical = a pit dug into the ground; sounds like keng
The 土 (earth) component on the left flags ground or dirt, and 坑 is a hole dug in it. Modern slang also uses 坑 for a trap or rip-off that someone falls into.
坑 — earth radical 土 + 亢 (kàng, phonetic)
A semantic-phonetic compound: 土 supplies the meaning 'earth/ground' while 亢 hints at the sound. The original sense was a hole or pit dug in the ground, which extended figuratively to 'trap' or 'to entrap someone' in modern usage.