The phrase "forge on" is an idiomatic expression that means to continue with a difficult or challenging task, to persevere despite obstacles, or to keep moving forward despite setbacks. It implies a sense of determination and persistence in the face of adversity.

Here are a few examples of how "forge on" might be used in a sentence:

• "Despite the difficult circumstances, we need to forge on and find a way to complete the project."
• "After the setback, she decided to forge on and keep working towards her goals."
• "Even though the road ahead is uncertain, we must forge on and do what we can to make progress."
• "The team encountered many obstacles, but they continued to forge on and eventually achieved their objective."
• "In the face of adversity, it's important to remember to forge on and not give up."