soften

To make something soft or softer.

Soften the butter before beating in the sugar.

To undermine the morale of someone (often soften up).

Before the invasion, we softened up the enemy with the artillery.

To make less harsh.

Having second thoughts, I softened my criticism.

I have recently reclad the south-west facing side of my single-storey cottage […]. I now want to plant some climbers of more manageable proportions to soften the building.

To become soft or softer.

The butter softened as it warmed up.

To become or make (a consonant) more lenis, to lenite.