1. your question
2. The roundabout spun as fast as it could
3. The Sat-Nav told me to turn at the next roundabout
4. My feelings are a bit like a roundabout, sometimes fast and sometimes slow
The junction is controlled by a roundabout.
Almost or roundabout
I've been roundabout for some time now.
Roundabout is spelled as one word when referring to circular intersections on streets.
The elderly driver became confused when driving on a large roundabout, and took an exit that put him miles out of his way.
The preposition in this sentence is "around," as it shows the relationship between the action of driving and the roundabout.
Use of the word periphasis may indicate that you meant to say periphrasis.
The word is round, as in a roundabout found on a road.
Circumlocation is not a word. Circumlocution is a word meaning a roundabout or ambiguous figure of speech. It is used often when a word isn't known but it's attributes are. It is also used to get around saying a word directly, for example: "where the bad men go" in place for Hell. In a sentence it is a noun: "He avoided the question by answering with circumlocutions."
It mean to infer, or suggest in a roundabout way.
Round is a root word. Around, roundabout, roundtable, rounding, surround
Computer 'voices' are electronically generated from a database of pre-recorded words. They do not instantly form sentences like humans do. Therefore, the person recording the words for the computer to speak doesn't necessarily speak the words as they would under normal speech. It's also done to save storage space on the device. Take as an example, a sat-nav device speaking to a driver. The voice could say something like "At the next roundabout, take the third exit" - The word 'third' would likely sound 'funny' because the speaker records the sentence "At the next roundabout, take the exit". (with a short gap before the word 'exit'. The sat-nav stores that sentence, along with separately recorded words 'first', 'second', 'third' etc. The device then 'merges the relevant separate word into the incomplete sentence. Recording the directions that way saves memory - as the device only needs to store one copy of the main sentence - with enough gap to 'slot' in the relevant word - instead of storing the complete sentence for every exit from the roundabout.