* For a very young baby: ` pàisde` (pronounced roughly "paysh-deh") is the most common and straightforward term.
* For a slightly older infant: You might use a phrase like `leanabh òg` (pronounced roughly "lyan-av oag"), meaning "young child."
The choice depends on the age and the nuance you want to convey. `Pàisde` is generally preferred for a baby under the age of one.