thread

a fine cord of twisted fibers (of cotton or silk or wool or nylon etc.) used in sewing and weaving

to move or cause to move in a sinuous, spiral, or circular course

the river winds through the hills

pass a thread through

thread a needle

any long object resembling a thin line

a mere ribbon of land

the connections that link the various parts of an event or argument together

I couldn't follow his train of thought