steep angle

(of aircraft) nosedive; descent at a steep angle; plunge

(of aircraft) to nosedive; to descend at a steep angle; to plunge

to rise sharply; to rise suddenly / (of aircraft) to ascend at a steep angle

sharp rise; sudden rise / (of aircraft) ascent at a steep angle

one's nature / characteristic / sex, gender / content

the nature of something

-ity, -ness, the nature of quality or something

one's nature / characteristic

(anatomy) an erector spinae