用法:
1 very deep 极深的:
a bottomless pit, gorge, etc 无底的深坑、峡谷等.

用法:
2 (fig 比喻) unlimited; inexhaustible 无限的; 无穷尽的:
bottomless reserves of energy 取之不尽的能源.

• co-ordination 1
• co-ordinator 1
• coot
• cop 1
• copartner
• copartnership
• cope 1
• copeck (also kopeck)
• Copernican
• copier
• co-pilot, copilot 1
• coping
• coping-stone
• copious
• copiously
• cop-out
• copper 1
• copper beech
• copper-bottomed
• copperhead
• copperplate
• coppice
• copra
• copse
• Copt