躓く

(1)miss a step and fall or nearly fall; "She stumbled over the tree root"

(2)足並みが乱れ、転ぶ、あるいはほとんど転びそうである

(3)be unsuccessful; "Where do today's public schools fail?"; "The attempt to rescue the hostages failed miserably"

(4)失敗する

(5)cause to stumble; "The questions on the test tripped him up"

(6)つまずかせる

(1)