"pitting" in the noun sense
1. pitting, roughness, indentation
the formation of small pits in a surface as a consequence of corrosion
"pitting" in the verb sense
1. pit, oppose, match, play off
set into opposition or rivalry
"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"
2. scar, mark, pock, pit
mark with a scar
"The skin disease scarred his face permanently"
3. pit, stone
remove the pits from
"pit plums and cherries"
Source: WordNet® (An amazing lexical database of English)
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