Any of several flowering plants, of the genus Uncaria (syn. Ourouparia) related to madder

Of, pertaining to, or happening within the magnetosphere.

(idiomatic) A child who returns home from school to an empty house and therefore must unlock/unlatch the exterior door with a key, especially a child of working or absent parent(s).

An act of retiring; withdrawal. / (uncountable) The state of being retired; seclusion. / (now rare) A place of seclusion or privacy; a retreat.