Simple past tense and past participle of pond.(verb)
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Use "ponded" in a sentence
"According to campus tradition, students are "ponded" on their birthdays."
"Vernal pools are usually quite small and ponded only during the wetter part of the year."
"Almost half the reserve area is formed of marismas - freshwater marshes on accumulated clayey silt - where the Guadalquivir river delta has been deflected and ponded by a coastal sand spit (~27,000 ha)."