きょうしつ教室kyoushitsu
1.

A designated space within a school where formal instruction or lessons take place, often equipped with desks, chairs, and teaching materials for students and teachers.

2.

A venue organized for the purpose of teaching various subjects or skills to interested individuals, fostering cultural or artistic education outside of traditional school settings.

3.

A specialized research room in a university specifically assigned to a particular academic subject, where in-depth study and investigation occurs.

Example:

教室は生徒でいっぱいだった。

しつshitsu
1.

A designated space within a building, typically used for various activities such as living, working, or conducting specific functions, often defined by its purpose and structure.

2.

A compartment that provides insulation or protection for items, often built underground or partially underground for preservation or cultivation purposes, such as storing ice or growing plants.

3.

A term denoting a female partner of a person of status, indicating a relationship of domestic partnership or marriage.

Example:

先生は生徒達に講義を退出させなかった。

しつない室内shitsunai
1.

The space located within the confines of a building, typically referring to areas such as rooms and living spaces, as opposed to outdoor or external environments.

2.

Pertaining to activities or items designed for use or performance inside a building, including specific contexts such as indoor games or music tailored for indoor settings.

3.

Encompassing all enclosed areas within a structure, highlighting the distinction from external surroundings and outdoor settings.

Example:

たとえ外はどんなに寒くとも、室内は気持ちよく暖められている。

しんしつ寝室shinshitsu
1.

A room designated for sleeping where family members rest.

2.

A space utilized for sleep and relaxation, often furnished for comfort.

3.

An area within a home intended specifically for use during nighttime rest or napping.

Example:

ジュディーは子供たちを寝室へ行かせた。

じしつ自室jishitsu
1.

A personal space within a residence designated for individual use, often featuring elements that reflect one's personality and preferences.

2.

A private area meant for relaxation, study, or hobbies, where one can retreat from communal living spaces.

3.

An enclosed area in a home that serves as a sanctuary for solitude and self-reflection, often representing a sense of ownership and comfort.

Example:

彼は自室に閉じこもった。