Artificial intelligent assistant

under-waistcoat

ˈunder-ˌwaistcoat
  (under-1 5 a.)

1794 Mrs. Opie in Brightwell Memorials, etc. (1854) 42 His green coat and crimson under-waistcoat. 1826 Southey Vind. Eccl. Angl. 251 The blessed Arnulph of the hedgehog skin underwaistcoat. 1838 Lytton Alice ii. ii, His black coat neatly relieved in the evening by a white underwaistcoat. 1863 N. & Q. 3rd Ser. III. 50 In some parts of Yorkshire..an underwaistcoat or ‘Jersey’ is called a ‘singlet’.

Oxford English Dictionary

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