strain (v.) 1
stretch, make extra effort
1H6 I.v.10 [Talbot to himself] My breast I'll burst with straining of my courage
Tim I.i.147 [Timon to Old Athenian, of Lucilius] To build his fortune I will strain a little
Tim V.i.225 [Second Senator to First Senator, of the threat of attack] Let us return, / And strain what other means is left unto us / In our dear peril