For this sense of the headword verb kaino/w, here in its present infinitive, see LSJ s.v., II (= kaini/zw, kappa 1170). The gloss comes from a misguided gloss on Herodotus 2.100.3 (web address 1), where this infinitive does occur (of Nitokris inaugurating an underground chamber) but tw=| lo/gw| is part of an 'ostensibly a, actually b' contrast.