Original: The Cyrillic letter lje (,) is a ligature of and and represents a palatal lateral, a sound similar (but not equal) to the palatalized alveolar lateral represented by the digraph.
Simplified: The Cyrillic letter lj (,) was similar to and and active member of words that participate in: palatal lateral, a sound similar (but not equal) to the palatalized alveolar lateral represented by the digraph.