There are various synonyms for the phrase "extend oneself," which means to exert maximum effort or go beyond the usual limit to achieve a goal. Examples of synonyms for "extend oneself" include:
1. Strive: This word implies efforts to reach a goal
2. Stretch: Used to describe making an extra effort beyond one's usual capacity
3. Exert: Refers to pushing oneself to achieve an objective or complete a task
4. Endeavor: Means putting forth a great deal of effort to do something well
5. Apply: Involves putting forth focused effort to accomplish a particular task
Other synonyms include push oneself, go the extra mile, and give it one's all. These synonyms are useful when expressing a more intensive effort towards a goal than what is usual.