Wiktionary
come at
vb. 1 (&lit come at English) 2 (context obsolete English) To come to; to attend. 3 (context obsolete English) To enter into sexual relations with. 4 To get to, especially with effort or difficulty. 5 To attack, to harass. 6 (context Australia New Zealand transitive slang English) To accept (a situation); to agree to do; to try. 1989, Joan Hughes, ''Australian Words and Their Origins''.
Usage examples of "come at".
And it still might come at any instant, but so far it hadn't, and the only light was the faint untroubled silver of the moon.