Brezhoneg Pevar/Lesson 3
Liester / Plural 
Internal plurals 
Some names have a plural that changes the internal vowels of the name.
lestr, listri (ship)
legestr, ligistri (lobster)
mab, mibien (son)
Numerals and Plural 
There is no plural after a numeral :
Daoù baotr, div blac'h,
tri mab, teir merc'h,
pevar mevel, peder matezh,
daoù zen warn-ugent (22 persons)
tri den ha tregont (33 persons)
Dual words 
Parts of the body may have a "dual" name :
Lagad, daoulagad (eye)
skouarn, divskouarn (ear)
glin, daoulin (lap)
dorn, daouarn (hand)
gar, divhar (leg)
These dual forms may have a plural (eg. daoulagadoù).
Collective names and singulative forms 
Some names have a collective meaning and may have a "singular" form.
Geot (grass), geotenn (blade of grass)
Gwez (tree), gwezenn ( a specific tree)
kouevr (copper), kouevrenn (a piece of copper)
The singulative forms are feminine and act as a singular form.
Hence, they may have a plural : geotennoù (blades of grass).
Ex 1 : Quiz 
Go to the Quiz.
Ex 2 : Memory training 
Write out the Breton words, section by section.
Have 2 columns, clearly separated, and write Breton and English. Then cover up one column (eg. English) with paper and write the corresponding words on the paper. Then try it the other way round, cover up the Breton, and write out the words using the English as cues. This will be a little bit more difficult.
Repeat all this after an interval, the more you do it the easier you will remember the words.