Don't we pretty much use 'to pine' in the same sense (and more senses beyond) of 'to repine'? It reminds me of the same relationship between iterate and reiterate with 're' being an intensifier, although I think here people use reiterate more than iterate, whereas they use 'pine' over 'repine.'

Actually, thank you, Anu, for this because it gives me another verb for the 're' as an intensifier example. Faldage would know the word I'm looking for that would be better than 'intensifier.'

Thanks, plutarch. Food to mull over today.