छिन्नं तु गाढसंश्लेषश्चुक्कितं दूरविच्युतिः । लेहनं जिह्वया लेहः किञ्चित् श्लेषः समं भवेत् ॥१५०॥
Chinna—when (the two lips) very closely meet each other. Cukṣita—when (the two lips) are held widely apart. Lehita—in licking the (lips) with the tongue. Sama—when (the two lips) slightly parted from each other.
english translation