Select the option that can be used as a one-word substitute for the given group of words.

Try hard to do or achieve something

Endeavour

The word that can be used as a one-word substitute for "try hard to do or achieve something" is endeavor.

• Endanger means to put someone or something in danger.
• Hardworking means working hard.
• Endeavour means to try hard to do or achieve something.
• Indent means to make a small recess or indentation in a surface.

Endeavour is the most appropriate word for the given group of words because it specifically refers to trying hard to do or achieve something. It is derived from the Old French word endevorer, meaning "to put oneself to trouble."