amus
Definitions (by source)
m., attempt, trial; attack, act of hitting the mark; tug amus, ‘tried,’ 584; with ar, 2341, 4117; but 9327, ‘he cannot hit the road’; cf. an rian díreach dh’amus, 9803
Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Editor: Osborn Bergin.