Learn how to say Impost correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word impost:
1a tax or similar compulsory payment:
some of the labels are used for the purpose of collecting Customs duty or other imposts
2 Horse Racing the weight carried by a horse as a handicap.
mid 16th century: from French (earlier form of impôt), from medieval Latin impostus, from Latin impositus, past participle of imponere (see impose)