1. To take the tenth part; to put to death every tenth man; to destroy in great numbers.

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

• desimate,
• decemated,
• decerate,
• desimale,
• dessimate,
• decite,
• desitate,
• desinate,
• dicipate,
• cimate,
• deciete,
• decicate,
• desilate,
• esimate,
• documate,
• decimle,
• donimate,
• dicitate,
• descimated,
• desimated

• decimeter,
• decimetre,
• descant,
• decimation,
• descent,
• desquamate.

The adverb form of the word "decimate" is "decimatingly".

The adjective form of the word "decimate" is "decimated".

The plural form of the word "decimate" is "decimates"

The singular form of the word "decimate" is still "decimate". The word "decimate" refers to the act of destroying or killing a large portion (usually one-tenth) of something or someone. It does not change in form when used in singular or plural contexts.