TASK DEFINITION: Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.
PROBLEM: I often hear US citizens say something like this: <Some phrases>. Period. What does period mean when it appears in a sentence by itself in this type of situation?.

SOLUTION: Period at the end of the sentence means, the things said in the sentence are definite and no change is allowed. For example, 'I want the document without any errors, period' meaning that there should not be any errors in the document.

PROBLEM: What is the difference between 'day off' and 'off day'? What I found is 'day off' means a holiday when you are not working, while 'off day' is the day when you do not work up to the mark. Can anyone put more light on this?.

SOLUTION: you are correct, the word 'off' like many small english words has a large number of meanings, some of them are even opposites. 'day off' meaning 'not present this day' Either scheduled break or due to dishonesty, illness or other emergency. off(adverb) 'away from a place' 'off day' meaning 'not performing well this day' off(adjective) 'not up to standard; not so good or satisfactory as usual; inferior or subnormal'

PROBLEM: What word means to make something obsolete? For example, the automobile made the horse and buggy obsolete. How would the word obsolete be applied as a verb? obsoleted The automobile obsoleted the horse and buggy. bleech. made obsolete The automobile made obsolete the horse and buggy. Not bad, but there's room for improvement. EDIT: I'm looking for a verb that has an edge; that captures the upheaval and aggressiveness involved in displacing a product or industry. Killed is a bit strong. killed The automobile killed the horse and buggy. A bit overstated. ran out of business The automobile ran the horse and buggy out of business marginally better, but still not good. disrupted the automobile disrupted the horse and buggy Better applied to an industry, like so the automobile disrupted the transportation industry in the early 20th century; particularly the horse and buggy. Wordy. smashed The automobile smashed the horse and buggy. More along the lines of what I seek, but a bit improper. XXX The automobile XXX the horse and buggy. What verb fits best here?.

SOLUTION:
Interestingly, you automatically used a word in your question that you didn't even comment onperhaps without realizing what you'd done: displace: 1 a : to remove from the usual or proper place specifically : to expel or force to flee from home or homeland // displaced persons 1 b : to remove from an office, status, or job 1 c obsolete : to drive out : BANISH 2 a : to move physically out of position // a floating object displaces water 2 b : to take the place of (as in a chemical reaction) : SUPPLANT So, in your example sentence: The automobile displaced the horse and buggy.

