Syllabic structures which are not well formed can be resolved via insertion of various types of phonemic material (movement, handshape, location and orientation) in DGS. This process is called epenthesis. The second movement in the sign head (a) is an epenthetic movement which disappears in the compound [Morphology 1.] form head^ache (b), as the structure of the compound does not require any additional movements.
a. head
‘head’
b. head^ache
‘headache’