foot, on 1
in employment, taking place, under way
2H4 I.iii.37 [Lord Bardolph to Hastings, of the war] the instant action, a cause on foot
KJ III.iv.169 [Cardinal Pandulph to Lewis the Dauphin, of the English reaction to King John] Methinks I see this hurly all on foot
MW [Fenton to Host, of Anne slipping away with Slender] While other jests are something rank on foot
WT I.i.3 [Archidamus to Camillo] my services are now on foot