foe

Short definition from Wiktionary

Adjective

1. 1
   Hostile.

Noun

1. 1
   An enemy.
2. 2
   A unit of energy equal to 10⁴⁴ joules.
3. 3
   Initialism of freedom of expression.
4. 4
   Initialism of forces of evil.

Proper noun

1. 1
   Initialism of Friends of the Earth.
2. 2
   Initialism of Fraternal Order of Eagles.
3. 3
   Initialism of Friends of the Earth.
4. 4
   A surname from German.