1. In truth; indeed.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• foresooth,
• forboth,
• forworth,
• forsyth,
• dorsooth,
• corsooth,
• vorsooth,
• fosooth,
• forsoth,
• forsoot,
• foorsooth,
• forssooth,
• fotcloth,
• fortooth,
• forslouth,
• forsloww,
• fourfoote,
• Forsqrt,
• Forscond,
• Wargooth

• fourth,
• forsythia,
• FORST,
• Forrest,
• Forsook,
• soothe,
• forth,
• Forsythe,
• froth,
• fortieth,
• south,
• Forsyth.

The adjective form of the word "forsooth" is "forsoothly".

The plural form of the word "forsooth" is "forsooths".

The singular form of the word "forsooth" is "forsooth".