列車のダイヤが遅れています。

train (ordinary)

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

diamond; (railway) schedule; diagram; dyer

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to be late; to be delayed; to fall behind schedule; to be overdue