פִּי הַחִירֹתPîy ha-Chîyrôth

proper name [of a location]: on east border of Egypt, Site unknown (Exodus 14:2; Exodus 14:9; Numbers 33:7; Numbers 33:8)

Pronunciation: pee hah-khee-roth' · Hebrew/Aramaic (Old Testament) · H6367

Same root

פֶּהpeh · H6310the mouth (as the means of blowing), whether literal or figurative (particularly speech); specifically edge, portion or side; adverbially (with preposition) according to
חוֹרchôwr · H2356a cavity, socket, den

Where it appears

Appears 7 times in the Bible.

Exodus 14:2 “Order the Israelites to turn back and camp by Pi-hahiroth between Migdol and the sea. Camp there along the shore, across from Baal-zephon.
Exodus 14:9 The Egyptians chased after them with all the forces in Pharaoh’s army—all his horses and chariots, his charioteers, and his troops. The Egyptians caught up with the people of Israel as they were camped beside the shore near Pi-hahiroth, across from Baal-zephon.
Numbers 33:7 They left Etham and turned back toward Pi-hahiroth, opposite Baal-zephon, and camped near Migdol.
Numbers 33:8 They left Pi-hahiroth and crossed the Red Sea into the wilderness beyond. Then they traveled for three days into the Etham wilderness and camped at Marah.

See every passage

Exodus 14:2, 14:9
Numbers 33:7, 33:8

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).