IPA: /ˈfɔːrədər/
KK: /ˈfɔːrərdər/
In a direction that is ahead or towards the front.
The car moved forrader down the road.
The word 'forrader' originates from Old English 'forrǽder', meaning a guide or leader. It combines 'for-' (meaning before or in front) and 'rǽder' (meaning one who leads or guides). Thus, 'forrader' refers to someone who leads or guides others ahead.
Think of someone who is 'leading' ('rǽder') others 'in front' ('for-') — that's why a forrader is a guide or leader.