Solution:Prosaic (Adjective) = नीरस, मामूली, तत्वहीन (not challenging; dull and lacking excitement; lacking wit or imagination).Uninspiring (Adjective) = उत्तसाह या रुचि पैदा न करने वाला, फीका (not producing excitement or interest).
Cunning (Adjective) = मक्कार, शातिर, धुर्त (skill in achieving one's ends by deceit; crafty, deceitful).
Patriotic (Adjective) = देश-भक्त, देशभक्तिपूर्ण (having or expressing devotion to and vigorous support for one's country).
Poetic (Adjective) = कवित्वपूर्ण, पुरजोश (relating to or used in poetry, zealous.
अतः Prosaic का उचित synonym Uninspiring है।