pitting

(noun) the formation of small pits in a surface as a consequence of corrosion. Synonyms: roughness, indentation.

(verb) set into opposition or rivalry. Synonyms: pit, oppose, match, play off. Examples: "Let them match their best athletes against ours." "Pit a chess player against the russian champion." "He plays his two children off against each other."

(verb) mark with a scar. Synonyms: scar, mark, pock, pit. Example: "The skin disease scarred his face permanently."

(verb) remove the pits from. Synonyms: pit, stone. Example: "Pit plums and cherries."