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

• herd-book
• herd-books
• herdboy
• herdboys
• herded
• herden
• herdens
• herder
• herders
• herdess
• herdesses
• herd grass
• herd-groom
• herd-grooms
• herdic
• herdics
• herding
• herd instinct
• herdman
• herdmen
• herds
• herd's grass
• herdsman
• herdsmen
• herdwick