月謝
げっしゃ · gessha · JLPT N1 · noun
fee
💴 月 (month) + 謝 (thanks, payment): the monthly fee you pay your teacher
月 means month and 謝 means thanks or payment, as in 謝礼 (a thank-you gift). 月謝 is the monthly thank-you payment made to a teacher for lessons.
月 — pictograph of crescent moon
月 is a pictograph of a crescent moon, chosen over a full circle to distinguish it from 日 (sun). The inner strokes originally depicted the moon's shadow or markings. As a radical it often relates to the moon, time, or (via a lookalike form of 肉 'flesh') body parts.