1 very deep 极深的
*a bottomless pit, gorge, etc 无底的深坑、峡谷等.
2 (fig 比喻) unlimited; inexhaustible 无限的; 无穷尽的
*bottomless reserves of energy 取之不尽的能源.
a bottomless hole, sea etc is one that is extremely deep
There was a rope dangling down into a dark, bottomless hole.
seeming to have no end or limit
the bottomless well of information available through the Internet
The government does not have a bottomless pit (=a supply with no limits) of money to spend on public services.