Meaning of -LY in English

-ly /li/ BrE AmE suffix

[ Language: Old English ; Origin: -lic , -lice ]

1 . [in adverbs] in a particular way:

She smiled happily.

He was walking slowly.

2 . [in adverbs] considered in a particular way:

Politically speaking it was a rather unwise remark.

a financially sound proposal

3 . [in adjectives and adverbs] happening at regular periods of time:

an hourly check (=done every hour)

They visit monthly (=once every month) .

4 . [in adjectives] like a particular thing in manner, nature, or appearance:

with queenly grace

a motherly woman (=showing the love, kindness etc of a mother)

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.