IPA: /ˈsoʊlli/
KK: /ˈsoʊl li/
Only or just; without anything else involved.
She decided to focus solely on her studies this semester.
Solely → It is formed from "sole" (from Latin *solus*, meaning alone or single) and "-ly" (a suffix used to form adverbs). The word "solely" means in a manner that is alone or exclusively.
Think of 'alone' ('sole') to remember that 'solely' means doing something exclusively or just by oneself.