Basic Guidelines For English SpellingsREAD THESE ARTICLES
1‘is she meeting some other guy on the sly?’
in secret, secretly, furtively, stealthily, sneakily, slyly, surreptitiously, covertly, clandestinely, on the quiet, on the side, behind someone's back, under cover
under the counter
informal on the q.t.
Are You Learning English? Here Are Our Top English Tips