bottomless
adj.having no bottom or being very deep. You use this to describe something that seems to go on forever or has an endless supply.
adj.having no bottom or being extremely deep; figuratively, having an infinite or seemingly endless supply. Often used to describe abstract concepts like patience or resources.
“The hotel has a bottomless supply of fresh towels.”
“The hikers were surprised to find a bottomless pit at the edge of the forest.”
“The company's bottomless appetite for expansion eventually led to a financial crisis that the board could not recover from.”
“None of which is the billpayer’s fault, who should not be treated as a bottomless source of funding for other people’s failures.”
From Middle English botemles, botmeles, equivalent to bottom + -less. Cognate with West Frisian boaiemleas (“bottomless”), Dutch bodemloos (“bottomless”), German Low German boddenloos (“bottomless”), German bodenlos (“bottomless”), Swedish bottenlös (“bottomless”), Icelandic botnlaus (“bottomless”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.