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ONAD→obturate

obturate

Flag: gbEnglishOxford New American Dictionary
obturate /ˈäbt(y)əˌrāt, ˈɑbt(j)əˌreɪt /
▸ verb [with object] technical block up; obstruct.
– DERIVATIVES
obturation /ˌäbt(y)əˈrāSH(ə)n, ˌɑbt(j)əˈreɪʃ(ə)n / noun
– ORIGIN late 16th century (as obturation): from Latin obturat- ‘stopped up’, from the verb obturare.