(literally) To begin digging in the earth at the start of a new construction, or, originally, for cultivation. / (idiomatic) To initiate a new venture, or to advance beyond previous achievements.

(military, slang) A military soldier whose primary role is infantry or the use of ground-based materiel.

(transitive, idiomatic) To mismanage to the point of ruin. / (transitive, idiomatic) To wear out, especially through excessive use. / (transitive, idiomatic) To discuss ad nauseam.

Glass having a rough, flat surface produced by abrasion or etching.

A species of pangolin, Smutsia temminckii (syn. Manis temminckii).

(sports) A rule regarding play on a specific field, course, or court. / (idiomatic, usually in the plural) The basic rules or standards; whatever someone must know before proceeding.

A thick copper bar required in telecommunication room installations to provide a central ground-point for equipment.

(aeronautics) Any aerodynamic effects occurring due to a vehicle's body or appendages moving in close proximity to the ground.

A place or region where animals go to breed. / (figuratively) A place or institution seen as creating large numbers of a stated thing, type of person, etc.

(intransitive, especially of an animal, chiefly UK) To escape into a burrow, hole, etc. when being hunted.