adamant
adj
(esp of a person or his manner) firmly or stubbornly determined; unwilling to be persuaded (尤指人或态度)坚决的, 坚强的, 倔强的, 坚定不移的
an adamant refusal 断然拒绝
She was quite adamant that she would not come. 她坚决不来.
On this point I am adamant, ie my decision will not change. 在这一点上我是坚定不移的.
and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.