Lexical Definition

‎רָכַס‎ râkaç (raw-kas') to bind H:V
a primitive root

bind.

1) (Qal) to bind

Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
וַיִּרְכְּס֣וּ and they bound Exod.39.21
וְיִרְכְּס֣וּ so they may bind Exod.28.28

Brown-Driver-Briggs

[‎רָכַס‎] verb bind (Assyrian rakâsu, id.; Late Hebrew found, lay foundation (rare); Arabic bind with [rope tying camel's head to forefoot] (Frey); but usually turn over, reverse (Lane)); —

Qal Imperfect 3 masculine plural ‎יִרְכְּסוּ‎ (P) Exod 28:28, ‎וַיִּרְכְּסוּ‎ Exod 39:21, bind ‎חשֶׁן‎ by (‎מִן‎) its rings to (‎אֶל‎) rings of ephod.

Brown-Driver-Briggs References

Book Refs
Exodus 28:28 · 39:21