I am referring to this use of verbs: a. It looks good/ it looks like a bird. b. I look at something. I'd love to find the right terms to describe this phenomenon whereby the same verb can be used to refer to the 'sensorial act' (perception: I look) and the sensorial effect of things or people (it looks) [a] - or where the two verbs have at least the same root (like see/ seem). But the main question is: it seems quite common in West and North Germanic languages, esp. with 'sensory verbs', but is it a more general phenomenon (universal ???). And: is it somehow possible to decide on whether one is older than the other?