I think wet doesn’t necessarily have to mean raining. It could had been raining a day before and now it’s wet (but not raining anymore); it might be pouring wet snow that is immediately melting on the ground (but not really raining), etc.
I keep getting grianach and greannach mixed up. I know they aren't even close in meaning or in usage but I keep typing one when I mean the other.
Any tips on a mnemonic trick to help remember which is what?