heft 
(hĕft)
(hĕft)n.
Weight; heaviness; bulk.
v. heft·ed, heft·ing, hefts
v.tr.
1. To lift (something) in order to judge or estimate its weight.
2. To hoist (something); heave.
v.intr.
To have a given weight; weigh.
[Middle English, from heven, to lift; see HEAVE.]