(lit. one eye, two legs/feet, three courage, four power) "first, eyes, second, feet, third, courage, fourth, power". The essentials of [kendo] in descending order of importance

to oppose; to face; to stand up to (someone)

one eye / Short for 一眼レフ (ichigan refu): single lens

difficult, trying, hard

difficulties, hardship, trouble

two, 2 / second

gallbladder; liver

gall bladder / courage

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend