How about stoic or stoicism. His stoic attitude in the face of his great loss led some to think that he had no real feelings.
impatient
Impatient.
To mime is to act out silently.
The word silently *is* an adverb. The adjective form is "silent."
The word is silentium.
silently
more silently
Silently is an adverb. Many adverbs end in the prefix -LY.
cheeky
Noisily
creeps
The word complaining has three syllables: Com-plain-ing.