At an angle of 90° to a given line, plane, or surface or to the ground.
Late Middle English (as an adverb meaning ‘at right angles’): via Old French from Latin perpendicularis, from perpendiculum ‘plumb line’, from per- ‘through’ + pendere ‘to hang’.
“The lamp post sat perpendicular to the street.”
The feeling of joy one has experiencing another’s joy, such as in witnessing a toddler’s joy and feeling joy in response.
From French compérage, derived from French compère, from Old French comper, from Latin compater, compatrem (“godfather”).