1. An extreme feeling of comfort and relaxation, for one thing to merge and become part of another
2. Something which is comfortable, soft, cushty, or absorbs you into it like a particularly comfortable beanbag/sofa/duvet
3. The blend of one thing into another which has no definitive line.
2. "Check out this smouldge, I could pass out here man" "This cusion is well smouldgable"
3. "I like how the colour smouldges together in that picture" "The sky is smouldging into the sea"