is nonmanual marker is a sign you do with your hands.

Yes, a nonmanual marker is a sign that is made using different movements or positions of the hands, rather than specific handshapes or gestures. Nonmanual markers can include facial expressions, head movements, body posture, and other movements of the hands or arms that convey meaning in sign language. These nonmanual markers play an essential role in conveying grammatical information and adding nuance to signed communication.

is suffix is added to the beginning of a word.

No, a suffix is not added to the beginning of a word. A suffix is a type of affix that is added to the end of a base word to modify its meaning or to form a new word. It is the opposite of a prefix, which is added to the beginning of a word. Suffixes can change the part of speech of a word, create new words, indicate tense or plurality, and much more. Examples of suffixes include -ment (argument), -ly (quickly), -able (comfortable), -ness (happiness), and so on.