IPA: /ˈpɛs.kɪ.li/
KK: /ˈpɛs.kɪ.li/
In a way that annoys or bothers someone.
The child kept asking questions peskily during the movie.
Peskily → The word 'pesky' originates from the dialectal term 'pesky' (meaning troublesome or annoying), which is derived from 'pest' (meaning a plague or annoyance) combined with the adverbial suffix '-ly' (meaning in a manner of). Thus, 'peskily' means in a troublesome or annoying manner.
Think of something that is 'troublesome' ('pesky') and how it can happen 'in a manner' ('-ly') that annoys you.