noun:

• heliox; gas mixture of helium and oxygen; often hypoxic gas mix used by divers; medical gas used for its low density and easy breathing

noun:

• subject (of a medical experiment, etc.); test subject; trial subject; testee ［被験者］
• examinee (of a full-body scan, etc.)

noun:

• question (e.g. on a test); problem
• problem (e.g. societal, political); question; issue; subject (e.g. of research); case; matter
• question (i.e. doubt)
• public discussion; controversy
• trouble; problem; inconvenience; difficulty

noun:

• various medicines; medical treatment
• supper in a Zen temple; rice porridge served for supper in a Zen temple

adjectival noun:

• cool (temperature, color, etc.)
• cool (i.e. calm and collected)
• cool (i.e. fashionable, attractive, etc.)

noun:

• course (of medical treatment) - From German "Kur"
• season (series) of a television program (usu. 13 installments over a 3-month period) - From French "cours"

noun:

• house of parliament (congress, diet, etc.) ➜ 下院【かいん】
• graduate school; postgraduate school

suffix:

• institution (often medical); institutional building; government office ➜ 医院【いいん】・病院【びょういん】
• sub-temple; minor temple building; temple; cloister - Buddhism term

noun:

• imperial palace - honorific language
• title bestowed on empresses, princesses, etc. - honorific language - archaism ➜ 女院【にょういん】

suffix:

• former (esp. of emperors, daimyos, etc.); late

suffix noun:

• from the standpoint of; as a matter of (e.g. fact); in the field of; being of the type of
• aboard (a ship or vehicle); on top of; on; above

noun:

• first volume (e.g. book) ➜ 下【げ】・上巻

noun / prefix:

• superior quality; best; top; high class
• going up
• governmental; imperial
• presenting; showing

prefix:

• ana- (medical, biol.)