עַשְׁתֵּיʻashtêy

one, only + עָשָׂר, עֶשְׂרֵה, = eleven, eleventh (Jeremiah 1:3; Jeremiah 39:2; Jeremiah 52:5; 2 Kings 25:2; Ezekiel 26:1)

Pronunciation: ash-tay' · Hebrew/Aramaic (Old Testament) · H6249

Same root

Where it appears

Appears 19 times in the Bible.

Exodus 26:7 “Make eleven curtains of goat-hair cloth to serve as a tent covering for the Tabernacle.
Exodus 26:8 These eleven curtains must all be exactly the same size—45 feet long and 6 feet wide.
Exodus 36:14 He made eleven curtains of goat-hair cloth to serve as a tent covering for the Tabernacle.
Exodus 36:15 These eleven curtains were all exactly the same size—45 feet long and 6 feet wide.
Numbers 7:72 On the eleventh day Pagiel son of Ocran, leader of the tribe of Asher, presented his offering.
Numbers 29:20 “On the third day of the festival, sacrifice eleven young bulls, two rams, and fourteen one-year-old male lambs, all with no defects.

See every passage

Exodus 26:7, 26:8, 36:14, 36:15
Numbers 7:72, 29:20
Deuteronomy 1:3
2 Kings 25:2
1 Chronicles 12:13, 24:12, 25:18, 27:14
Jeremiah 1:3, 39:2, 52:5
Ezekiel 26:1, 40:49
Zechariah 1:7

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).