Strong's H6161עֲרֻבָּה: something given as security, i.e. (literally) a token (of safety) or (metaphorically) a bondsman KJV:pledge, surety.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.
Root family 1686: עָרַבʿārab — take on pledge, give in pledge, exchange; go surety for; have fellowship, share; braid, intermix, traffic, give to be security; engage, meddle, mingle, mortgage, occupy, give pledges, be surety, undertake