1. To make an attempt to gain; to try to effect or achieve.

2. Exertion of one's ability, physical or intellectual, toward the attainment of an object; effort; exertion.

3. To make endeavour or exertion for the accomplishment of an object.

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

• endevour,
• endavor,
• endenvours,
• endaevour,
• endeaveor,
• endeovour,
• indevour,
• indeavor,
• edeavor,
• endvour,
• endevaour,
• endearvor,
• endavours,
• endervor,
• endavoer,
• endeviour,
• endevours,
• endeovours,
• endouvour,
• endevoure

• endeavor,
• endeavors.

The adjective form of the word "endeavour" is "endeavouring".

The plural of the "endeavour" can be the "endeavours".

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