1　prudent = sensible
2　relentless = ruthless
3　retroactively = retrospectively
4　shrewd = calculating, astute
5　speculative = conjectural, risky
6　tangible = substantial
7　tedious = humdrum
8　tentative = provisional
9　tenuous = flimsy, fragile, shaky
10 unanimously
11 reciprocate
12 lackluster = undistinguished
13 lucrative = remunerative
14 marginally = negligibly
15 meekly = acquiescently
16 mudane = pedestrian, worldly
17 paltry = trifling
18 pertinent = relevant
19 pragmatic = expedient
20 uncanny = weird