Via : by means of a particular person, system, etc. Examples : I heard about the sale via Jane. The news programme came to us via satellite. ..............................................................

i'm communicating with you via italki

By 1.Used in specifying adjacent dimensions "a room ten by twenty metres" 2.By means of; with aid of; through the act or agency of; "destroyed by fire" 3.In the neighbourhood of, close to "my house is by the church" 4.At some time before; before the end of a given time interval "get it done by 9am tomorrow" 5.On, in traversing "came by the path" Via 1.By way of "diversion via the sideroad" Through 1.From beginning to end "read this book through" 2.Over the whole distance "this bus goes through to New York" 3.To completion "think this through very carefully!" 4.In diameter "this cylinder measures 15 inches through" 5.Throughout the entire extent "got soaked through in the rain"; "I'm frozen through"; "a letter shot through with the writer's personality"; "knew him through and through"; "boards rotten through and through" cowboy...

Through 1 - from one end or side of sth to the other: Put the coffee in the filter and let the water run through. The tyre’s flat—the nail has gone right through. The onlookers stood aside to let the paramedics through. The flood was too deep to drive through. 2- from the beginning to the end of a thing or period of time: Don’t tell me how it ends—I haven’t read it all the way through yet. I expect I’ll struggle through until payday. 3- Past a barrier, stage or test: The lights were red but he drove straight through. Our team is through to (= has reached) the semi-finals. 4- 4travelling through a place without stopping or without people having to get off one train and onto another: ‘Did you stop in Oxford on the way?’ ‘No, we drove straight through.’ This train goes straight through to York.

By not later than the time mentioned; before: Can you finish the work by five o’clock? I’ll have it done by tomorrow. By this time next week we’ll be in New York. He ought to have arrived by now / by this time. By the time (that) this letter reaches you I will have left the country. past sb/sth: He walked by me without speaking. during sth; in a particular situation: to travel by day / night We had to work by candlelight. used to show the degree or amount of sth: The bullet missed him by two inches. House prices went up by 10%. It would be better by far (= much better) to … from what sth shows or says; according to sth: By my watch it is two o’clock. I could tell by the look on her face that something terrible had happened. By law, you are a child until you are 18. used to show the part of sb/sth that sb touches, holds, etc.: I took him by the hand. She seized her by the hair. Pick it up by the handle! used with the to show the period or quantity used for buying, selling or measuring sth: We rented the car by the day. They’re paid by the hour. We only sell it by the metre. used to state the rate at which sth happens: They’re improving day by day. We’ll do it bit by bit. It was getting worse by the minute (= very fast). The children came in two by two (= in groups of two). used for giving more information about where sb comes from, what sb does, etc.: He’s German by birth. They’re both doctors by profession.