soften up
Verb
Meaning
To make softer.
(by extension, idiomatic) To appease someone in order to make them more receptive to an idea or proposal.
To become less committed to something.
Source: en.wiktionary.orgSynonyms
Examples
And, I’m really hoping that the rains will set in so that soil will soften up enough that I can dig up some of the new garden beds at least enough so that I can get the garlic planted and some new tulip bulbs tucked in.
That’s to soften up the fibres.