隔週
かくしゅう · kakushuu · JLPT N1 · adverb
every other week
📅 隔 = skip over, 週 = week: skip one week, then meet again
隔 means to leave a gap or separate. 隔週 is one week on, one week off: week, skip, week, skip, so something happens every other week.
隔 — 阜 (mound 阝) + 鬲 (cauldron, phonetic)
A semantic-phonetic compound. The left element 阝 (mound/hill) suggests a barrier or separation, while 鬲 (an ancient three-legged cauldron) supplies the sound. The original sense of being blocked off by terrain extended to today's meanings of 'separate,' 'partition,' or 'at an interval.'