subassemble

[ suhb-uh-sem-buh l ]
/ ˌsʌb əˈsɛm bəl /

verb (used with object), sub·as·sem·bled, sub·as·sem·bling.

to assemble a basic unit of (a larger assembly).

Origin of subassemble

back formation from subassembly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019