What is the meaning of Nā?

plural definite article; the

calm, quieted

soothed, pacified

settled

Rōmaji transcription of なあ

Hanyu Pinyin reading of 那

Hanyu Pinyin reading of 南

good

Plural definite article; the

Introduces a subordinate clause; lest, in case

Expresses exclusiveness of the following nominal; only, just

to stop crying

that

Source: wiktionary.org