Smith's Bible Dictionary (1863)
a place before or at which the Israelites encamped, at the close of the third march from Rameses (the last place before they crossed the Red Sea), when they went out of Egypt. (Exodus 14:2,9; Numbers 35:7,8) It is an Egyptian word, signifying “the place where sedge grows.”
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
PIHAHI'ROTH (mouth, or entrance of caverns, or place of reservoirs), the last place where the Israelites encamped before crossing the Red Sea. Ex 14:2, Gal 1:9; Num 33:7-8. Robinson identifies it with Ajrud, 12 miles from Suez, now a watering-place for caravans, and is approved by Lepsius. In a curious papyrus deciphered by Chabas it is said that Pehir (which seems to be the same as Pihahiroth) was the place from which King Rameses was supplied
with garlands of beautiful flowers. Stanley says that there is now no appearance of verdure there.