foursquare

(geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon

• “you can compute the area of a square if you know the length of its sides”

in a square position

• “the building stood foursquare”

with firmness and conviction; without compromise

• “he stood foursquare for religious liberty and toleration” C.G.Bowers
• “dealt straightforwardly with all issues”

characterized by firm and unwavering conviction

• “a foursquare refusal to yield”