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sub-tutor
sub-tutor n. 
/ˈsʌbˌtʃuːtə/,
Brit. /ˈsʌbˌtjuːtə/
, /ˈsʌbˌtjuːtə//ˈsʌbˌtʃuːtə/U.S. /ˈsəbˌt(j)udər/
now historical/ˈsəbˌt(j)udər/ΚΠ
1663 E. Waterhouse Fortescutus Illustratus iii. 49 This was Vlpian, neither he that was a Sub-Tutor to Alexander,..nor that other.
1683 in S. Clarke Lives Sundry Eminent Persons i. 156 That part which was to be acted by the Sub-tutour..was that of Surda, an old woman.
1744 T. Birch Life R. Boyle 69 Mr. Tallents..had been..sub-tutor to several sons of the earl of Suffolk.
1880 J. G. Austin Mrs. Beauchamp Brown ii. 17 Just as quiet and gentlemanly and patient, as a sub-tutor.
1999 P. Gordon & D. Lawton Royal Educ. iv. 104 The boys were to be woken at 7 a.m., to read mathematics with a sub-tutor from 8 to 9.
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