This is the 4988th most frequent Japanese word.
組み立
"組み立" (Kumitate) means "assembly" or "construction."
組み立てる means 'to assemble', referring to putting parts together.
この棚を組み立てるのは少し時間がかかります。
Assembling this shelf takes a bit of time.
組み立てる in this case describes a professional work of assembly.
彼は機械を組み立てる仕事をしている。
He works assembling machines.
組み立てる is metaphorically used to mean structuring or organizing parts of a concept.