mishandle β to handle badly; maltreat: to mishandle a dog.
screw up β a metal fastener having a tapered shank with a helical thread, and topped with a slotted head, driven into wood or the like by rotating, especially by means of a screwdriver.
goof β to blunder; make an error, misjudgment, etc.
grapple β to hold or make fast to something, as with a grapple.
grope β to feel about with the hands; feel one's way: I had to grope around in the darkness before I found the light switch.
mismanage β Manage (something) badly or wrongly.
scrabble β to scratch or scrape, as with the claws or hands.
spoil β to damage severely or harm (something), especially with reference to its excellence, value, usefulness, etc.: The water stain spoiled the painting. Drought spoiled the corn crop.
louse up β any small, wingless insect of the order Anoplura (sucking louse) parasitic on humans and other mammals and having mouthparts adapted for sucking, as Pediculus humanus (body louse or head louse) and Phthirius pubis (crab louse or pubic louse)
misfield β an expanse of open or cleared ground, especially a piece of land suitable or used for pasture or tillage.
blunder β A blunder is a stupid or careless mistake.
miscalculate β Calculate (an amount, distance, or measurement) wrongly.
misjudge β Form a wrong opinion or conclusion about.
mistake β an error in action, calculation, opinion, or judgment caused by poor reasoning, carelessness, insufficient knowledge, etc.
muff β sheet glass made from a blown cylinder (muff) that is split and flattened.
trip β a group of animals, as sheep, goats, or fowl; flock.
go wrong β not in accordance with what is morally right or good: a wrong deed.