गुण-सन्धि

This सन्धि is the substitution of गुण syllables (vowels) in place of इक् vowels when they occur after अ/आ.

• अ/आ + इ/ई = ए  
• अ/आ + उ/ऊ = ओ 
• अ/आ + ऋ/ॠ = अर् 
• अ/आ + लृ = अल् 

However, there are certain exceptions wherein वृद्धि vowels are substituted instead of गुण.