a.
1.
Civil, ~al, civic.
2.
Wise, prudent, judicious, discreet, sagacious, prudential, wary, provident, astute, long-headed.
3.
Artful, cunning, shrewd, intriguing, sly, wily, subtle, foxy, Machiavelian, ingenious, unscrupulous, crafty, skilful, diplomatic, strategic.
4.
Well-devised, well-adapted.