The word for today is…
assiduous (adj) – Showing or characterised by persistent attention or untiring application
Source : The Free Dictionary
Etymology : Judges presiding over assizes (former periodical sessions of the superior courts in English counties) had to be assiduous in assessing how to best address their cases. Not only were their efforts invaluable, but they also serve as a fine demonstration of the etymologies of assiduous, assess, and assize. All three of those words derive from the Latin verb assid?re, which is variously translated as “to sit beside,” “to take care of,” or “to assist in the office of a judge.” Assid?re, in turn, is a composite of the prefix ad- (in this case, meaning “near” or “adjacent to”) and sed?re, meaning “to sit.”
