Abbreviation for the Latin id est or "that is"; always followed by a comma.
See emigrate, immigrate.
No hyphen when it means "not": inaccurate, insufferable. Often no hyphen in other cases, as well: inbound, indoor, inpatient. Some combinations take a hyphen: in-law. Follow Webster’s New World College Dictionary when in doubt.
Abbreviate and capitalize as Inc. when used as part of a corporate name. It usually is not needed, but when it is used, do not set off with commas: J.C. Penney Co. Inc. announces... Also, see brand name.
The rules in prefixes apply, but in general, no hyphen: infrared, infrastructure.
The rules in prefixes apply, but in general, no hyphen. Inter- means between or among: interracial, interstate. Intra- means within or inside: intramural, intravenous.
A decentralized worldwide network of computers that can communicate with each other. If an internet address falls at the end of a sentence, use a period. (If an address breaks between lines, split it directly before a slash or a dot that is part of the address, without an inserted hyphen.) Although in some cases it may not be necessary, use the http:// protocol at the start of a web address, as well as other starts, such as ftp://. Also, see Computer terminology and URL.
See inter-, intra-.