attenuate = at(一再) + tenu(细，薄) + ate(使) = 使…变细→削弱
ous = ous(形容词) = 有优势的
adventurous = ad(临近) + vent(来，走) + ure(行为) + ous(形容词) =
For example, we have had civilisation on Earth for perhaps only a few thousand years, and the threats of nuclear war and pollution over the last few decades have told us that our survival may be tenuous.
The cultural and historical links between the many provinces were seen to be very tenuous.
This decision puts the President in a somewhat tenuous position.
Obviously, some of my deductions are quite tenuous.
Holding on to the tenuous thread that connected him with life and hope.