You can either say "tráthnóna" (traw-no-nah) or "oiche" (ee-hah) for evening as there isn't really a specific word for this.
"Tráthnóna" typically means "afternoon" but you can use it to refer to early evening.
"Oiche" usually means night but it would be appropriate to use it for late evening.
So to say good evening would be "Oiche maith duit" or "Tráthnóna maith duit" - maith is said like the "mo" in "mop"
feasgar math means 'good afternoon/evening'.
In Irish it's "tráthnóna maith duit"
Feasgar math (fesker mah)
'Gaelic' is not a single language; there are two major types: Scottish Gaelic is feasgar. Irish is tráthnóna.
"Gaelic" can mean "Irish Gaelic' or "Scottish Gaelic". They are classified as two distinct languages.
In Irish, 'the common good' would be 'leas an phobail'.In Scottish Gaelic: ?
It is mac in Scottish Gaelic.
math as in slàinte mhath (good health).
The Scottish Gaelic for 'brother' is bràthair.
It is òran in Scottish Gaelic.
in Scottish Gaelic: facal.
The Scottish Gaelic is do charaid.
In Irish d'fhíorghrá;in Scottish Gaelic: ?
It's Scottish, but not Scottish Gaelic. Originally a Scots variant of Margaret.(Margaret is Mairead in Scottish Gaelic.)
hallo (borrowing from English)madainn mhath - good morning feasgar math - good afternoon oidche mhath - good evening/good night