n. 25B6; cardinal number
UNIT, item; technical monad.
only one person came : A SINGLE, a solitary, a sole, a lone.
her one concern was her daughter : ONLY, single, solitary, sole.
they have now become one : UNITED, a unit, unitary, amalgamated, consolidated, integrated, combined, incorporated, allied, affiliated, linked, joined, unified, in league, in partnership; wedded, married.
mono-, uni-.