逾期
yú qī · HSK 7
to be overdue
⏰📅 逾 = exceed + 期 = deadline/period: you went past the set date, so it is overdue
逾 carries the sense of crossing over or exceeding a limit; 期 is a fixed period or appointed time. Together they mark a deadline that has been passed — a library book or bill that is now late.
期 — 其 (phonetic) + 月 (moon/time)
期 is a phono-semantic compound. The right side 月 (moon) signals meaning, since lunar cycles marked fixed time periods in ancient China. The left side 其 supplies the sound. Together it points to a set time, period, or appointed date — meanings still carried today in words like 期间 and 日期.