superquality means of very high quality. Lexicurio rates it Sui generis — a strength score of 88 out of 100.
Etymology
From super- + quality.
adj
- Of very high quality.“It is believed by many that this genuine superquality magnetic sand has a mysterious and attracting power.”
noun
- A remarkable quality.“It is here more than any other time that the worker must employ every possible discretion, and at the same time possess superqualities of tact, diplomacy and personality.”