1. things that make something less tight, firm, or rigid
Usage: plural of loosener
2. substances or tools used to loosen bolts, screws, or stuck parts
Usage: mechanical context

Examples

• The mechanic used several different looseners to remove the rusted bolts.
• Muscle looseners helped reduce the tension in her shoulders.
• These chemical looseners work well on stuck screws.
• The physical therapist recommended gentle looseners for his stiff joints.
• WD-40 and similar looseners are essential tools in any garage.
• Warm-up exercises act as natural muscle looseners before workouts.