Do English words that begin with sn always, typically or often, have a meaning that is in some way unpleasant?

Is there a name for such a phenomenon?

It does not appear to be onomatapoeia

https://en.wikipedia.org/wiki/Onomatopoeia

Words such as snare, snarl, snap, sneer, sneeky, snooty, sneeze, snore, snort

Some depend on one's point of view

Snow can be a delightful, picturesque winter wonderland, but not if one is stranded in snow with a broken-down car.

A snail could be regarded as a pest or a delight to observe depending upon one's point of view. But what was the opinion when the word originated?

Can anyone think of a word in English that starts with sn that has a pleasant meaning?

Perhaps snooze?

William