1. (a.) Urgent; pressing; critical\; exacting or requiring immediate aid or action.

2. (n.) Exigency; pressing necessity; decisive moment.

3. (n.) The name of a writ in proceedings before outlawry.

Spartan Spartanic accurate acute astringent attentive austere authoritarian burdensome burning charged choiceless clamant clamorous climacteric close compelling compulsory conscientious correct critical crucial crying decisive delicate demanding detailed dour draining emergent exact exacting exorbitant exquisite extortionate fine finical finicking finicky fussy grasping grievous grim harsh high-pressure high-priority imperative imperious importunate insistent instant kairotic loaded loud mandatory menacing meticulous minute narrow necessary necessitous nice obligatory oppressive particular persistent pertinacious pivotal precise precisianistic precisionistic pregnant pressing punctilious punctual refined religious rigid rigorous rugged scrupulous scrutinizing severe stern strict stringent subtle superincumbent taxing threatening tough unsparing urgent weighty without choice