cogitabund

Learned borrowing from Latin cōgitābundus (“thinking, thoughtful”), from cōgitō (“to think; to consider, ponder; to intend, plan”) + -bundus (suffix forming adjectives with an active or transitive meaning). Cōgitō is derived from con- (prefix indicating a bringing together of several things) + agitō (“to put in motion; to rouse, stir up; to consider, meditate upon; to contrive, intend; to deliberate upon, discuss”) (from agō (“to act, do; to impel, move; to deliberate, discuss; to think upon”), ultimately from Proto-Indo-European *h₂eǵ- (“to drive”)) + -itō (suffix forming frequentative verbs)).

来源：wiktionary