What does "might" exactly mean in the following excerpt?

This is a excerpt from Le Morte d'Arthur by Sir Thomas Malory, and I want to know the exact meaning of might regarding the context. Some say by might we mean:

being allowed to

and some say it means:

being able to

Of course we are all aware of the first meaning but relating to the later one, I couldn't find anything related. Here is the excerpt:

And thereupon Isoud fell down in a swoon, and so lay a great while And when she might speak she said: My lord Sir Tristram, blessed be God ye have your life, and now I am sure ye shall be discovered by this little brachet, for she will never leave you.

Solution 1:

The etymology clearly points at "being able to" or "have the strength to"

might (v.)

Old English mihte, meahte, originally the past tense of may (Old English magen "to be able"), thus "*may-ed." See may (v.). The first record of might-have-been is from 1848.

might (n.)

Old English miht, earlier mæht "might, bodily strength, power, authority, ability," from Proto-Germanic *makhti- (cf. Old Norse mattr, Old Frisian, Middle Dutch, Dutch macht, Old High German maht, German Macht, Gothic mahts), Germanic suffixed form of PIE root *magh- (1) "be able, have power" (see may (v.)).

In Danish we have "at magte" where "Jeg magter det ikke" means I do not have the strength or capability to do it

Solution 2:

Unfortunately, I do not know the book, and therefore cannot give you a conclusive answer.

It is possible that might is used as 'being able to,' as she might have recovered from the shock.

But it is also possible, that she is only now being allowed to speak, and thus changing the meaning to 'being allowed to.'

I hope that this answer was helpful