verbs
bother persistently with trivial complaints
"She nags her husband all day long"
worry persistently
"nagging concerns and doubts"
is a type of (narrower)
disturb the peace of mind of; afflict with mental agitation or distress
"I cannot sleep--my daughter's health is worrying me"
remind or urge constantly
"she nagged to take a vacation"
is a type of (narrower)
put in the mind of someone
"Remind me to call Mother"