Commitment

adjective continuing without change; enduring; steadfast

• She was known for her abiding commitment to the principles of justice and equality.
• I have an abiding love for chocolate chip cookies.
• My friend's abiding crush on that celebrity is getting out of hand.
• The abiding sense of loss he felt after his grandfather passed away never truly went away.

noun the quality of being loyal; faithfulness or devotion to a person, country, group, or cause

• Loyalty is a highly valued trait in the business world.
• I appreciate your loyalty to our friendship.
• Real ones know the importance of loyalty.
• Her loyalty to the cause was unwavering, like a rock in a stormy sea.

noun constant or close attention to what one is doing; diligence

• His assiduousness in completing all tasks assigned to him is truly commendable.
• She showed great assiduousness in studying for her exams.
• Dude, your assiduousness in cleaning your room is on point.
• The artist's assiduousness in perfecting every brushstroke is reflected in the masterpiece he created.