Final answer:
The shape of nitrosyl hydride is best described by the two-word phrase 'bent,' due to the presence of one lone pair and two bonding pairs around the nitrogen atom, resulting in a V-shaped structure.
Step-by-step explanation:
The two-word phrase that best describes the shape of nitrosyl hydride (HNO) is bent. This molecule has significant lone pair interactions due to the presence of one lone pair on the nitrogen atom. The geometry around the nitrogen involves three areas of electron density: two bonding pairs and one lone pair. The electron-pair geometry is tetrahedral for nitrogen, but the molecular shape is bent (or V-shaped) due to the lone pair causing a repulsion that leads to a bent structure. This configuration can also be described as a trigonal planar arrangement with a missing vertex.