fǽr-haga
This might be just a supplemental entry substituting part of an entry in the Main Volume.
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
fǽr-haga
Substitute: Calamity that compasses about Wæs se báncofa ádle onǽled . . . leomu hefegedon sárum gesóhte . . . hé his módsefan wið þám fǽrhagan fæste trymede the body was inflamed with disease . . . the limbs grew heavy attacked by pains . . . he fortified his mind firmly against the ills that compassed it about, Gú. 933.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.