Let's take a look at how to pronounce the vowels ea in Gaelic.
The ea sound has both a long and short form. The short ea sound, without a grave accent can be heard in fear (a man) and in bean (a wife):
a man and a wife
The short ea sound can also be heard in sean (old):
an old man
The long eà sound (note the grave accent) can be heard in ceàrr (wrong):
wrong or right