Tsuki means "month" or "moon" in Japanese.
In Japanese the word "Tsuki" carries deep cultural symbolism for femininity, cycles, and beauty and it also refers to various "punches" in martial arts such as karate and is also used in Japanese month names like "Mutsuki", and "Yayoi".
This shows it's versatility that is beyond just celestial bodies or actions.
Moon is the most common meaning of "Tsuki" in Japanese and is often associated with poetry, grace and feminine cycles in folklore and art.
Month as the meaning of "Tsuki", is used in counting months, with older Japanese names for months often ending in "-tsuki," like Mutsuki meaning January and Uzuki meaning April.
For the poetic phrase, the word "Tsuki" is used as "Tsuki ga kirei desu ne" which means, "The moon is beautiful, isn't it?", which is a famous, indirect way of saying "I love you" in Japanese.
In Martial Arts such as Karate and Judo.
Tsuki in Martial arts refers to various punching techniques which include.
Kagi-tsuki means "Hook Punch".
Age-tsuki means "Uppercut".
And Oi-tsuki means "Lunge Punch".
In other contexts Tsuki can be used as a beautiful name for girls and symbolize moon like qualities.
And figuratively in idioms like Tsuki to Suppon, the word Tsuki means "Moon and soft shelled turtle," which highlights two different things that are completely different.