1. To suffer; to endure something burdensome or painful to the body or mind; to pass through; to sustain without fainting, yielding, or sinking.

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

• undere,
• underged,
• indergo,
• undergoed,
• underc,
• undergos,
• indego,
• undergae,
• undergad,
• undert,
• undera,
• undergoe,
• underth,
• undermy,
• undeg,
• underr,
• undego,
• endergy,
• underv,
• underge

• underscore,
• undersize,
• untier,
• underfed,
• underfelt,
• undertake,
• underbody,
• underboss,
• underwear,
• undercoat,
• undergrow,
• undershoot,
• underhand,
• underbid,
• underact,
• underway,
• understock,
• undercover,
• underworld,
• underpay,
• Underdahl,
• underseal,
• underlay,
• underage,
• underhung,
• under way,
• underbred,
• underdown,
• underdone,
• under,
• undersell,
• underlying,
• undergird,
• unadorned,
• underplay,
• underived,
• undertone,
• underwood,
• undergrad,
• underside,
• under it,
• underpin,
• undershot,
• undertide,
• underpass,
• underhill,
• undersoil,
• underline,
• undermine,
• underrate,
• underwater,
• underquote,
• undersea,
• under arms,
• underlie,
• underfur,
• undercut,
• undertaker,
• underslung,
• undersign,
• undoer,
• undertow,
• underpart,
• undershrub,
• understood,
• underwing,
• underdog,
• underarm,
• underling,
• underfoot.

The adverb form of "undergo" is "undergoing".

The adjective form of the word "undergo" is "undergone".

The plural form of the word "undergo" is "undergoes"

The singular form of the word "undergo" is "undergoes"