male adult / the 4th of the 10 Heavenly Stems 天干[tian1 gan1] / fourth (used like "4" or "D") / small cube of meat or vegetable / (literary) to encounter / (archaic) ancient Chinese compass point: 195° / (chemistry) butyl
Mnemonic symobl: a nail. 一 is the head of the nail and 亅 is the shaft. The point of the nail is already a bit bent. Dorothy Gale (di) balances a flute (一) on a crowbar (亅) in front of the engine ((e)ng1). For this trick, she wins the fourth (丁) place in an artists competition and gets a quarter (丁) of a pizza as prize. Unfortunately, there is a big nail (mnemonic symbol for 丁) on the pizza slice.
to sting or bite (of mosquito, bee etc) / to say repeatedly / to urge insistently / to ask repeatedly / to stick to a point / (onom.) tinkling or jingling sound
In front of the engine ((e)ng1), Dorothy Gale (di) is celebrating the anniversary of the witche's death by repeatedly (叮) stinging (叮) a mandarin (口) with a nail (丁) and singing "叮咚 the witch is dead!"