godan verb (-su), transitive verb
Archaic transitive verb. In modern Japanese, it is mostly encountered in the compound 褒めそやす (ほめそやす), meaning 'to praise lavishly' or 'to sing the praises of'.
See also: 褒めそやす
In classical Japanese, そやす alone meant 'to praise', but now it is used in the form 褒めそやす.