Do you know ghouls from goblins and ghosts?
"in a satisfactory manner," Old English wel, common Germanic (cf. Old Saxon wela, Old Norse vel, Old Frisian wel, Dutch wel, Old High German wela, German wohl, Gothic waila "well"), from PIE *wel-, *wol- (cf. Sanskrit prati varam "at will," Old Church Slavonic vole "well," Welsh gwell "better," Latin velle "to wish, will," Old English willan "to wish;" see will (v.)). Also used in Old English as an interjection and an expression of surprise. Well-to-do "prosperous" is recorded from 1825.
"to spring, rise, gush," Old English wiellan (Anglian wællan), causative of weallan "to boil, bubble up" (class VII strong verb; past tense weoll, past participle weallen), from Proto-Germanic *wal-, *wel- "roll" (cf. Old Saxon wallan, Old Norse vella, Old Frisian walla, Old High German wallan, German wallen, Gothic wulan "to bubble, boil"), from PIE root *wel- "to turn, roll" (see volvox), on notion of "roiling or bubbling water."
"hole dug for water, spring of water," Old English wielle (West Saxon), welle (Anglian), from wiellan (see well (v.)).
A deep hole or shaft sunk into the Earth to tap a liquid or gaseous substance such as water, oil, gas, or brine. If the substance is not under sufficient pressure to flow freely from the well, it must be pumped or raised mechanically to the surface. Water or pressurized gas is sometimes pumped into a nonproducing oil well to push petroleum resources out of underground reservoirs. See also artesian 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.