IPA: /ˌɪntrəˈsteɪt/
KK: /ɪntrəˈsteɪt/
Referring to something that happens or exists within the limits of a single state, rather than between different states.
The intrastate commerce regulations apply only to businesses operating within the same state.
Intrastate is formed from "intra-" (meaning within) and "state" (from Latin "status", meaning condition or state). The word refers to something that occurs within a single state or jurisdiction.
Think of 'intra-' meaning 'within' — that's why intrastate refers to activities happening within one state.