Brown-Driver-Briggs (BDB)
H2840
H2840 חִשּׁוּר , חִשֻּׁר
Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain
Strong's H2840 · Hebrew
chishshur
khish-shoor'
from an unused root meaning to bind together; combined, i.e. the nave or hub of a wheel (as holding the spokes together)