Newly means having happened only a very short time ago. Fresh, and still being noticed.
It nearly always sits in front of a past participle, giving newly married, newly appointed, newly built, newly qualified. That is the whole grammar of the word, and it does not stand alone. It carries a hint of the change still being visible, which is why newlyweds are called that and nobody says it after a year. Recently and just do the same job in looser constructions.
1adverbnewlyVery recently, used before a past participle.
“The newly appointed head arrived in January.”
Old English
nīewlīċe — newly
Middle English
newly
English, today
newly
From Middle English newly, newely, neweliche, from Old English nīewlīċe (“newly”), equivalent to new + -ly. Compare Dutch nieuwelijks, German neulich, Danish nylig, Icelandic nýlega. More at new, -ly.
Etymology from Wiktionary, CC BY-SA