You can be overwhelmed and underwhelmed, but can you just be whelmed?

Overwhelmed comes from the verb to overwhelm, which means to engulf, surge over, submerge, overpower (emotionally), crush, cause to surround or to cover. So when you feel overwhelmed, you might feel crushed, overpowered or engulfed by everything [source].

Underwhelmed comes from to underwhelm, which means to fail to impress or perform disappointingly. It was coined in the 1950s as a humorous negation of overwhelm. I hope you won’t be too underwhelmed by this blog post. [source].

Both to overwhelm and to underwhelm come from to whelm, an old word that means to bury, cover, engulf, submerge, ruin, destroy or overcome with emotion. As a noun, whelm means a surge of water or a wooden drainpipe. They come from Middle English whelmen (to turn over, capsize, invert, turn upside down), perhaps from Old English *hwealmnian, a variant of *hwealfnian, from hwealf (arched, concave, vaulted), from Proto-West Germanic *hwalb, from Proto-Germanic *hwalbą (arch, vault), from Proto-Indo-European *kʷelp- (to curve) [source].

Related words include unwhelm (to raise (sb) up from under something that has overwhelmed them), and whelming (something that covers or submerges).

Words from the same roots include gulf in English, Walm (bevelled roof, particularly if triangular and in a gable) in German, welven (to arch, bend like an arch, be shaped like an arch) in Dutch, valv (vault, arch) in Swedish, and cupla (fault, guilt, blame) in Spanish [source].