Here's a breakdown:
* n- is the past tense prefix in Irish.
* déachaigh is the past tense stem of "éirí".
Therefore, "ndéachaigh" literally means "went up" or "rose".
Here are some examples of how "ndéachaigh" could be used in a sentence:
* Ndéachaigh an ghrian: The sun rose.
* Ndéachaigh an t-éan: The bird flew up.
* Ndéachaigh an bád: The boat went up (the river).
It's important to note that the meaning of "ndéachaigh" can vary depending on the context. It can also be used in more figurative senses, such as describing someone's spirits rising or their status increasing.