-ly

1) a suffix forming adverbs from adjectives:

gladly; gradually; secondly[/ex]

2) a suffix meaning “every,” attached to nouns denoting units of time:

hourly; daily[/ex]

3) an adjective suffix meaning “-like”:

saintly; cowardly[/ex]

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Etymology: (adv.) ME -li, -lich(e), OE -līce (-līc adj. suffix +-e adv. suffix); (adj.) ME -li, -ly, -lich(e), OE -līc, suffixal use of gelīc like I