narthex

The story

1. Pre-Greek · derived from
2. Ancient Greek · borrowed fromνάρθηξ“giant fennel; casket”
3. English todaynarthex

From Ancient Greek νάρθηξ (nárthēx, “giant fennel; casket”), a Pre-Greek word, as suggested by the suffix. See also νάρδος (nárdos, “nard”).