heft (v.) Look up heft at Dictionary.com
"to lift, try the weight of," 1660s, from heft (n.). Related: Hefted; hefting.
heft (n.) Look up heft at Dictionary.com
mid-15c., "weight, heaviness, quality of weight," from heave (v.) on analogy of thieve/theft, weave/weft, etc. Also influenced by heft, obsolete past participle of heave.