The consonant digraph ch is used to represent a single sound /ch/. It can appear in initial, final, and medial positions as in change, couch,and voucher. The digraph ch can be silent as in yacht. It can also be used to represent the /k/ sound as in chasm and anchor. When chappears in final and medial positions, it is often spelled tch as in match, watch, pitcher, and hatchet. Other spellings include c as in cello, t as inposture, and ti as in question.