トウ, ひ, ほ, ともしび, とも.す, あかり

lamp, a light, light, counter for lights

JLPT2 G4 S6 F1605

As per # (straight) + fire → *light* raised high, such as a torch → *lamp* (compare ). In Japan, was also adopted as a Shinjitai (new character form) to replace .

[Full Kanji Etymology List]