1. with great effort, energy, or determination
2. in a way that strongly opposes or resists something

Examples

• She worked strenuously to finish the project on time.
• The athlete trained strenuously for the upcoming competition.
• He strenuously objected to the proposed changes.
• The lawyer strenuously defended her client’s innocence.
• They strenuously denied any involvement in the scandal.
• The hikers climbed strenuously up the steep mountain trail.