reasonable

Etymology

From Middle English resonable, from Old French resnable, from Late Latin rationabilis, from Latin ratio; more at reason, -able.

adj

1. (now rare) Having the faculty of reason; rational, reasoning.
2. Just; fair; agreeable to reason.
   The episode also opens with an inspired bit of business for Homer, who blithely refuses to acquiesce to an elderly neighbor’s utterly reasonable request that he help make the process of selling her house easier by wearing pants when he gallivants about in front of windows […] May 27, 2012, Nathan Rabin, “TV: Review: THE SIMPSONS (CLASSIC): “New Kid On The Block” (season 4, episode 8; originally aired 11/12/1992)”, in The Onion AV Club
3. Not excessive or immoderate; within due limits; proper.
   a reasonable demand, amount, or price
4. Not expensive; fairly priced.
   $20 a bottle is very reasonable for a good wine at a restaurant.
   Say, would you happen to know a good place for lunch in the downtown area? ... The Radisson ... Oh yah? ... Is it reasonable? - Marge Gunderson in Fargo (1996)
5. Satisfactory.
   The builders did a reasonable job, given the short notice.