plummet /plumˈit/

To plunge headlong

To fathom, sound

1. A leaden or other weight, esp on a plumb line, sounding-line, or fishing-line
2. A plumb rule

• jack-rafters
• Jack Robinson
• Jack Russell
• Jack Russells
• Jack Russell terrier
• Jack Russell terriers
• mattings
• mattins
• mattock
• mattocks
• mattoid
• mattoids
• mattress
• mattresses
• maturable
• maturate
• maturated
• maturates
• maturating
• maturation
• maturational
• maturations
• maturative
• mature
• matured