purchaseless

形容词 adj.
中文释义

英文释义

形容词 adj.
  1. Devoid of grip or purchase. not-comparable
    — The use of these projections […] is to apply upon the foetal scalp a pressure, counter to that made on the skull by the teeth of the crotchet, in order to ensure the penetration of the latter without the possibility of their slipping purchaseless along the smooth cranial bones, or of failure from any other cause whatsoever.

词源

From purchase + -less.
1 次浏览 数据来源: Wiktionary