This is the 6400th most frequent Japanese word.
ジジ
"ジジ" is an informal or affectionate term used to refer to an old man or grandfather in Japanese.
In this sentence, "ジジ" is used as a proper noun, possibly referring to a name or nickname of a person or an animal.
ジジは公園を散歩しています。
Jiji is strolling in the park.
Here, "ジジ" indicates a specific character or individual who performed the action of fixing the clock.
ジジが時計を直してくれた。
Jiji fixed the clock for me.
"ジジ" here denotes someone or something, like a pet or family member, residing in the mentioned location.