Informal Characterised by ease, comfort, or relaxation; soothing
Whenever and whatever you may be up to or at, the right kind of background music and the soothier class of song will get you doing it more happily, more frequently, better perhaps or at greater expense.1970, Punch, volume 259, page 27:
I saw him once pulling whistlepig spines out of a stray redbone hound, keeping him calm with a soothy voice and holding him off from snapping while the spears came out. You could see he valued what he could do with his hands.2006, R. T. Smith, Uke Rivers Delivers, page 117:
1 more example
What a soothy sound to my ears. For a moment those words almost erased the dislocation of my tumble.2009, Alan Robbins, Following the Trail of Blood:
Ministrant spirits, guardian influences, Embosom thee; and wondrous charms and spells Circle thy steps; and soothiest oracles Unfold new lore of life in speech replete With olden wisdom […]1859, William Whitmore (the Younger.), Gilbert Marlowe and other poems: