tsuくすkusuつくtsukusu
1.

To dedicate oneself completely to a task or cause, leaving no effort unturned and ensuring that there are no regrets left behind, often implying an unwavering commitment to the pursuit of a goal or resolution.

2.

To express something in its entirety, providing a thorough and comprehensive account without leaving any details or emotions unspecified, often used in contexts of conveying complex feelings or situations.

3.

To apply oneself selflessly for the benefit of others, such as a community or family, indicating a level of devotion where personal interests are set aside in service of a greater purpose.

4.

To reach a state where no further actions or resources can be expended, indicating the culmination of effort to the fullest extent possible, often seen when all options have been thoroughly explored.

Example:

トロール漁船は沿岸の魚をとりつくしました。

tachitsuくすkusutaちつくすchitsukusu
1.

To remain frozen in place due to being overwhelmed by an emotional experience, unable to react or move in response to a significant event.

2.

To be so stunned or astonished by one's surroundings or circumstances that one loses track of time and remains standing, absorbed in the moment.

3.

To experience a powerful impact that leaves one momentarily speechless and immobile, often as a reaction to unexpected or intense situations.

Example:

その少年は恐れおののき立ちつくした。

でつ出尽detsuくすkusu
1.

To reach a state where nothing is left, resulting in a complete depletion or exhaustion of available resources or options.

2.

To fully reveal or express everything available in a discussion or situation, leaving no further contributions or points to be made.

3.

To arrive at a point where all possibilities have been explored, leaving no remnants or unanswered questions behind.

iitsuくすkusu
1.

To express everything that needs to be said without leaving anything out, often used when discussing topics that are fully covered or exhausted in conversation.

2.

To convey all thoughts or feelings completely, reaching the point where nothing more can be added to the discourse.

3.

To articulate every essential detail of a matter, ensuring that nothing significant is omitted in the explanation or narrative.

4.

To thoroughly communicate an idea or argument, making it clear that all relevant information has been presented.