(dated) unpatriotic person, traitor

an astronaut (member of the crew of a spaceship or other spacecraft, or someone trained for that purpose)

pessimist

pessimism

vapor trail, contrail

play (a stringed or keyboard musical instrument)

(transitive) pull (something toward oneself) / (transitive) pull (along); drag; drag along; bring along while going somewhere / (transitive) bring (people) in; bring together

ground meat, minced meat

flying; flight

宇宙飛行士: an astronaut (member of the crew of a spaceship or other spacecraft, or someone trained for that purpose)