Rag, rig and rug are all commonly used words. There’s no “rog”, but there is a word called “rogue”, which I call “instant word”. “Instant word” means a word that one can remember instantly, like love at first sight, and never forget. Rogue is such a word.
rag: a piece of old cloth; (informal) a newspaper, typically one regarded as being of low quality. The problem with the usage of this word is that as a non-native speaker, I don’t know if this word is a term of endearment of a term of contempt. It probably has both connotations, and for this reason I don’t dare to use it in case I use it incorrectly.
rig: This word is probably originally referring to an apparatus for a sailboat. However in real life, it means to conduct (something) fraudulently so as to produce a result or situation that is advantageous to a particular person. For example, a rigged game, a rigged market,
rug:a floor covering of thick woven material or animal skin, typically not extending over the entire floor.
rogue: a dishonest or unprincipled man. an elephant or other large wild animal driven away or living apart from the herd. “Go rogue” is a phrase one heard very often about somebody who’s out of control. This is not to be confused with the word rouge, which means a red powder or cream used as a cosmetic for coloring the cheeks or lips.
wriggle: twist and turn with quick writhing movements.
wrangle: a dispute or argument, typically one that is long and complicated.
Commonly Used Phrases
rag doll: a soft doll made from pieces of cloth.
in rags: (of clothes) tattered and torn.
ragtag: untidy, disorganized, or incongruously varied in character.
from rags to riches: from a state of having very little money to a state of having a lot of money She went from rags to riches overnight.
the game is rigged, or to rig the market: If someone rigs an election, a job appointment, or a game, they dishonestly arrange it to get the result they want or to give someone an unfair advantage.
big rig: a transport vehicle consisting of a semi-tractor and attached trailer.
rigmarole: a lengthy and complicated procedure or a long, rambling story or statement.
full rig: fancy or ceremonial clothes.
fishing rig: Fishing rigs are the combination of hooks, sinkers, snaps and swivels that you add to the end of your fishing line.
under the rug: to hide (something that is illegal, embarrassing, or wrong) He tried to sweep his past mistakes under the rug.
pull the rug out from under: abruptly withdraw support from (someone).”I couldn’t just pull the rug out from under her feet like that”
magic carpet: capable of flight, or instant movement of passengers from one place to another
rogue elephant: a wild elephant that separates from the herd and roams alone.
rogue nation: a nation or state regarded as breaking international law and posing a threat to the security of other nations.
rogue trader: a securities trader who engages in speculative trading without authorization.
wriggle one’s way out of something: to avoid or disentangle oneself from some situation, task, duty, or responsibility, especially through sly, devious, or cunning means.