IPA: /ˌɪn.səˈfɑːr/
KK: /ɪnˈsoʊfɑr/
To such an extent or degree; used to indicate the limits of something.
The project will be successful, insofar as everyone contributes their part.
Insofar is formed from "in" (meaning within) and "so far" (meaning to that extent). The word describes a condition or extent that is limited to a certain degree or range.
Think of being 'within' a certain limit ('in') and how far that limit extends ('so far'). This helps you remember that 'insofar' refers to a specific extent or condition.