elusive
adj
(a) tending to escape or disappear; difficult to capture 逃避的; 躲避的; 难以捕捉的
a most elusive criminal 极难逮捕的罪犯.
(b) difficult to remember or understand 难以记忆的; 难以理解的; 难以捉摸的
an elusive perfume 难以捉摸的香味
an elusive word 难记的词.
If an unfair law existed, - and there were many that had been passed by the British rulers in India and South Africa - it was the duty of everyone to disobey this law, but without using violence.