IPA: //ˈsɛkslɛsli//
KK: /sɛkslɛsli/
In a way that does not involve or express sexual attraction or appeal.
The characters in the story interacted sexlessly, focusing on their friendship rather than romance.
Sexlessly → It is formed from "sex" (from Latin "sexus", meaning gender or sex) and "-less" (meaning without). The word "sexlessly" means without sex or gender characteristics.
Think of 'sex' as referring to gender and '-less' meaning without — so 'sexlessly' describes something that is without gender.