The correct spelling of chill + -ly is <em>chilly</em>.
The suffix -ly is added in order to form the adverb <em>chilly </em>out of the adjective <em>chill</em>.
As a general rule, to transform an adjective into an adverb, we simply add the suffix -ly to the adjective after the last syllable.
For example:
- slow → slowly
- pitiful → pitifully
- strong → strongly
The adverb <em>chilly</em> presents an exception to this rule: when adding the suffix -ly if the root word ends with a double L we drop one L to form the adverb.
Other examples of double l adjectives + ly:
- shrill → shrilly
- full → fully
- bull → bully
You can learn more about suffix -ly in the link below:
brainly.com/question/7977753
#SPJ4
