How do I Say and Write
"Forty" in Japanese?

Pronunciation : For"ty
Part of Speech : a.
Etymology : [OE. forti, fourti, fowerty, AS. fe?wertig; fe?wer four + suff. -tig ten; akin to OS. fiwartig, fiartig, D. veertig, G. vierzig, Icel. fj?rutiu, Sw. fyratio, Dan. fyrretyve, Goth. fidw. See Four, and Ten, and cf. Fourteen.]
Definition : Defn: Four times ten; thirtynine and one more.
Source : Webster's Unabridged Dictionary, 1913

Pronunciation : For"ty
Part of Speech : n.;
Definition : 1. The sum of four tens; forty units or objects.

2. A symbol expressing forty units; as, 40, or xl.

pl. Forties (.
Source : Webster's Unabridged Dictionary, 1913