To rootle is to dig with a snout, to poke about or search. Whilst you're doing it you're rootling and afterwards you'll have rootled.
Somewhere I have a photo of pigs rootling, but when I rootled through my hardrve I got distracted, so here are some steps instead. Do you know where they are? Have you climbed them?
What were you looking for last time you rootled – and did you find it?