gladly(in a glad manner) adverb [UK: ˈɡlæd.li] [US: ˈɡlæd.li]I will gladly help you. = Jag hjälper dig gärna.
willingly(of one’s own free will) adverb [UK: ˈwɪ.lɪŋ.li] [US: ˈwɪ.lɪŋ.li]She would willingly come but she was on vacation. = Hon skulle gärna kommit men hon var på semester.