Well

(Heb. beer), to be distinguished from a fountain (Heb. 'ain). A
"beer" was a deep shaft, bored far under the rocky surface by
the art of man, which contained water which percolated through
the strata in its sides. Such wells were those of Jacob and
Beersheba, etc. (see Gen. 21:19, 25, 30, 31; 24:11; 26:15,
18-25, 32, etc.). In the Pentateuch this word beer, so rendered,
occurs twenty-five times.