I'm only familiar with Alkanes at a basic level currently. What seems logical to me is that an Alkyl molecule with the:
"iso" prefix means its an isomer of that alkyl, the usual way i'd see it would be the alkyl group with a substituent (the way an hexane could be isopentane if I got it right)
as for the "sec" prefix, the alkyl group is connected to the main molecule through a secondary carbon (meaning the carbon on the alkyl is bonded with two other carbons in the alkyl, no consideration given to the main chain here)
I find the "tert" prefix similar to the latter, it is connected to the maine chain through a tertiary carbon (bonded with three carbons on the alkyl)
I couldn't find a basic logical way to address the definition of the "neo" prefix.
Are the ways I described the rest of the prefixes correct?