1. Slowness, unwillingness; lateness.

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

• gardines,
• tardness,
• tardies,
• tydiness,
• tartiness,
• tirdness,
• tardyness,
• tirdyness,
• tadiness,
• tardines,
• tardenes,
• tartyness,
• trainess,
• tardieness,
• caddiness,
• tardinesse,
• tariness,
• tardiess,
• tardniess,
• tabdiness

• turdinae,
• tartness.

The adjective form of the word "tardiness" is "tardy".

The plural of the "tardiness" can be the "tardinesses".

The singular of the "tardiness" can be the "tardiness".