IPA: /ˈɪərɪli/
KK: /ˈɪrɪli/
In a way that causes a feeling of fear or unease, often because something is strange or mysterious.
The lights flickered eerily in the dark room, making everyone feel uneasy.
Eerily → It is formed from 'eerie' (from the Scottish word 'eerie', meaning strange or frightening) and the suffix '-ly' (meaning in a manner of). The word 'eerily' means in a strange or frightening manner.
Think of something that feels 'strange' or 'frightening' ('eerie') happening 'in a manner' ('-ly') that makes you feel uneasy.