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.

There is an Urban Dictionary entry saying Of Old English origin, shortening of 'Good Speed,' and contrary to popular belief has nothing to do with God. People would say this to others who were leaving on a long and perilous journey, wishing them success, but more importantly wishing for their return. Edited: Can it be used without invoking any nuance of religiosity ? Well guys, I did check the references and did find the explanations which ended up becoming the answer for the question. What I meant was to get an educated opinion on the usage of the term in modern times. How a question with so many votes gets put on hold is beyond me.
'God speed you' is an example of a term with religious origins. Whether that makes it a 'religious term' depends on what your definition of a 'religious term' is. It's pretty archaic now. Perhaps surprisingly, it's not (originally) wishing 'speed' to the person - it's from the old English word 'spede' which means 'success' (and from which 'speed' is derived). So it's saying 'May god give success to you'. There are several phrases in common usage which have religious origins - often they now exist in a contracted form which isn't obviously recognisable as religious. For example, 'goodbye', which is a contracted form of 'God be with you'. I think that most people wouldn't say that 'goodbye' is a 'religious term' (again, dependent on whatever that actually means), despite its religious origins. Because 'god speed you' clearly contains the word 'god', it's more likely to be described as religious, I would say.

Is there a semantic difference between engine and motor? In some cases, would the use of one or the other word be technically incorrect?.
I like the definitions provided by WordNet and their definition is the way I've understood the difference: A motor is a machine that converts other forms of energy into mechanical energy and so imparts motion. An engine is a motor that converts thermal energy to mechanical work. wordnetweb.princeton.edu So an engine is a specific type of motor. That's why it's not incorrect to speak of a motorboat, or a motorcar, or a motor speedway, even if the boat or car is clearly powered by combustion. Note that if there's no combustion, there's no engine. Purely electric cars don't have engines. As nouns, motor can also refer to a nonspecific agent that causes motion: 'happiness is the aim of all men and the motor of all action', and engine can refer to something used to achieve a purpose: 'an engine of change', a railway locomotive, or a machine used in warfare: 'medieval engines of war'.

What is the difference between 'Did you find?' and 'Have you found?' When should I use the first sentence, and when the second one?.

Did you find is the simple past and indicates that you are no longer looking for it. Have you found is the present perfect and indicates a link with the present, specifically, that you could still be looking for it.

