plural of junior high

plural of sugar high

plural of knee high

plural of thigh-high

plural of contact high

plural of Her Royal Highness and His Royal Highness

(idiomatic) To abandon somebody; to stop providing assistance at a crucial moment.

The form of the German language spoken from 1350 or 1500 to 1650 CE, successor to Middle High German.

plural of high-frequency gravitational wave

(physics, astronomy) gravitational radiation, in the megahertz to gigahertz region, which is proposed to have been produced by the Big Bang or by the collision of massive astronomical objects or artificially in the laboratory. Gravitational waves having frequencies higher than 100 kHz.