1) Emotionless 2) Impassive 3) Not complaining 4) Not showing feelings 5) Showing no emotion 6) Stoic 7) Unemotional 8) Unexcitable and unmoved 9) Unmoved 10) Very cool Found on https://www.crosswordclues.com/clue/stoical
• (n.) Of or pertaining to the Stoics; resembling the Stoics or their doctrines. • (n.) Not affected by passion; manifesting indifference to pleasure or pain. Found on http://thinkexist.com/dictionary/meaning/stoical/
impassive; characterized by a calm, austere fortitude befitting the Stoics: a stoical sufferer. · (cap.) of or pertaining to the Stoics. Found on https://www.infoplease.com/dictionary/stoical