to unfasten a boat from something connecting it to land or to the bottom of the sea, a lake, a river, etc.

He had attempted to steal a 45ft yacht, without first unmooring it. 他企图偷一艘45英尺长的游艇，却没有先解开系泊的缆绳。

On the 23d of October I unmoored and made ready for sea. 10月23日，我卸下船锚，准备出海。

to become less involved with, connected with or influenced by something, or to make someone or something do this

J. K. Rowling has succeeded in unmooring the boarding school story from wealth, class and snobbery. J. K. 罗琳成功地将寄宿学校的故事与财富、阶级和势利脱钩。

The institution needs to grow, even if that means unmooring itself from its founder's educational ideals. 这所学校需要发展，即使这意味着与创始人的教育理想脱钩。