A joint contributes at least five combining forms and a muscle adds half a dozen more, so the only way through is to take the words apart. Click the boundaries inside each term to cut it into its word parts — then name each part suffix first, the way the chapter decodes. Get the cuts wrong and the feedback tells you exactly which letters belong together and why.
Step 1 · cut the term into its parts
Click between letters to drop a slash. Click a slash again to remove it.