he was selfishly and personally motivated and utilized "dirty" tactics.
under-utilized
(under-utilize 的过去分词) vt. 未充分使用
underutilized
a. 未充分利用的
unutilized expenditure
[经] 未利用的支出额
utilized bandwidth
[计] 使用带宽
utilized bandwidth ratio
[计] 使用带宽比
utilized cost
[经] 已利用的成本