• The cost of the machine is prohibitive ( or exuberant ).
• Prohibitively ( or Unduly , or Excessively ) high cost .
• The cost of the machine is prohibitive ( or exuberant ).
• Prohibitively ( or Unduly , or Excessively ) high cost .
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012