Baldly means plainly and without softening what is said. Put baldly, stated baldly, to put it baldly.
It nearly always appears as put baldly, warning that what follows will be blunt. The bald in it is the sense of bare rather than anything to do with hair.
1adverbbaldlyPlainly and without softening what is said.
“She stated the facts baldly: the company was closing, and everyone would lose their jobs.”
baldly is a manner.
From bald in the sense of bare or plain, plus -ly.
Middle English
balled
English
bald
English, today
baldly
Built from
From bald + ly. bald comes from Middle English balled, from bal. From Middle English balled, ballid, bald (“bald”), of unknown origin. Probably formed from Middle English bal, balle (“ball, round object, knoll, head”). Compare gmq-oda bældet (“bald”). An alternate etymology relates it to Old English bǣl (“fire, flame; funeral pyre”), from Proto-Germanic bēlą. Compare Albanian balë (“white spot on the forehead”) and ballë (“forehead”).
Etymology from Wiktionary, CC BY-SA