plumb (adjective) plumb: vertical
Detalii: a plum is any of numerous varieties of small to medium-sized round or oval smooth-skinned fruit with a single pit, while a plumb is a weight on the end of a line used to determine water depth or used to establish a true vertical
Sinonime: fount, fountain,
genesis, origin, root,
seed, wellspring
Antonime: flat, horizontal,
level