stumble

nouns

an unsteady uneven gait

lurch, stagger, stumble

an unintentional but embarrassing blunder

"he recited the whole poem without a single trip"; "he arranged his robes to avoid a trip-up later"; "confusion caused his unfortunate misstep"

misstep, stumble, trip, trip-up

walk unsteadily

"The drunk man stumbled about"

bumble, falter, stumble

miss a step and fall or nearly fall

"She stumbled over the tree root"

stumble, trip

is derived from

encounter by chance

"I stumbled across a long-lost cousin last night in a restaurant"

hit, stumble

make an error

"She slipped up and revealed the name"

slip up, stumble, trip up

is derived from