Translation:The teacher fights with the parent.
Does this fight mean a physical altercation or can it mean an argument too?
If it were just an argument. Which word would then be used? B'fheidir 'pléann'?
When there is an object, when do you use le and when do you use leis?
Leis an … can trigger either lenition (in Ulster Irish) or eclipsis (in the other dialects), but it triggers neither if the word begins with either D, S, or T — thus excluding any mutation to tuismitheoir.
The tips/notes for the eclipsis unit says that leis an does eclipse the next word, but not if it begins with d or t. So, no eclipsis of tuismitheoir.
'leis' is used instead of just 'le' in front of 'an' because otherwise you'd have hiatus between the words. Using 'leis' means that the words flow better.
Why is "tuismitheoir" not eclipsed here? I thoguht "leis an" (= "le" + "an") would eclipse (as in the earlier sentence "rithim chucu leis an gcat")
Edit: Ah, I've just found this sentence in the notes for the Eclipsis skill: "An exception to this rule [i.e. the rule that some prepositions eclipse the word after "an"] is that the word should not be eclipsed if it begins with d or t."
Words that begin with S should also not be eclipsed (or lenited in Ulster Irish) in this circumstance.