This is the 5715th most frequent Japanese word.
ちい
"ちい" (chii) can mean "small" or "little" in Japanese, though it is often part of larger words or expressions.
In this sentence, 'ちい' is part of the adjective 'ちいさな,' meaning 'small,' describing the size of the bird.
ちいさな鳥が空を飛んでいます。
A small bird is flying in the sky.
Here, 'ちいさな' is used to describe the volume of the voice, implying speaking quietly.
ちいさな声で話してください。
Please speak in a small voice.
In this sentence, 'ちいさく' modifies the verb, indicating the manner or size in which the box was finished, showcasing an adverbial usage.