灯
dēng · HSK 2
lamp
💡🏮 灯 = 火 (fire) + 丁 (nail/peg); a fire fixed on a stand = a lamp
The radical 火 marks it as fire-related; 丁 gives the dēng sound and originally suggested a small post or peg. Together: a flame mounted on a stand — a lantern or lamp.
灯 — fire radical 火 + ding 丁 (phonetic)
灯 is a semantic-phonetic compound: 火 'fire' gives the meaning (lamps once burned oil or flame), while 丁 hints at the sound. It is the simplified form of the traditional 燈, which used 登 as the phonetic. Today it means 'lamp' or 'light'.