Bengali is not alone. Echo words exist in Hindi (चाय-वाय), Tamil (kaapi-vaapi), Korean (이것 저것), and even colloquial English (fancy-schmancy). But Bengali has elevated it to a near-grammatical necessity, especially in rural and urban informal speech.
The word “Proshika” (প্রশিক্ষক) is derived from the Sanskrit and Bengali root √śikṣ (শিক্ষ্) meaning “to learn” or “to train.” Adding the prefix Pra- (প্র-) intensifies the action. Thus, “Proshikkhon” (প্রশিক্ষণ) means “training.” proshika shabda
To master the “Proshika Shabda,” one must see it in action. Below are examples from simple to complex: Tamil ( kaapi-vaapi )