What is the Latin word for immethodical?

The usual Latin words for “immethodical” are incompositus, inconditus, ōrātiō; also temerārius. The right choice depends on the sense; see the distinctions below.

English → Latin

“immethodical” in Latin

incompositusdisorderly, disorganized; clumsy inconditusirregular, disordered, confused; uncouth, rude ōrātiōspeech, discourse, language; the power of speech; manner or style of speaking temerāriusaccidental; casual, rash, heedless; reckless

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

immethodical

incompositus (not well arranged; of things; e.g., oratio): inconditus (e.g., jus civile, without arrangement). Sometimes temerarius (without previous consideration, etc., ; of men or things): qui omnia raptim agit et turbate (who does everything in a hurried, perplexed way; after Caes., B.C., 1, 5): *qui temere omnia et fortuito agit: *qui nullam habet certam viam atque rationem (of things).

Quick answer

What is the Latin word for immethodical?: The usual Latin words for “immethodical” are incompositus, inconditus, ōrātiō; also temerārius. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.