| irrational |
without reason or sense. [2 definitions] |
| irregular |
uneven in shape, arrangement, surface, or some other way. [4 definitions] |
| irregularity |
the quality of being irregular. [2 definitions] |
| irrelevant |
not having anything to do with the matter being considered or talked about. |
| irresistible |
impossible not to give in to or resist. |
| irresponsible |
not having or showing responsibility; not able to be counted on or trusted. |
| irreversible |
impossible to reverse, turn back, or change. |
| irrigate |
to supply with water by artificial means from a natural source of water. |
| irrigation |
the supplying of water to land by man-made means. |
| irritable |
easily bothered or angered. |
| irritate |
to anger or bother. [2 definitions] |
| irritation |
the act of irritating, or that which irritates. [3 definitions] |
| is |
a form of the verb "be" which is used with he, she, it, and with singular nouns. |
| -ish |
a suffix that means "of" or "from." [3 definitions] |
| Islam |
a religion founded by Muhammad. Its holy book is called the Koran. [3 definitions] |
| Islamabad |
the capital city of Pakistan. |
| island |
an area of land smaller than a continent and surrounded by water on all sides. [2 definitions] |
| islander |
a person who was born on or lives on an island. |
| isle |
an island. |
| islet |
a tiny island. |
| isn't |
shortened form of "is not." |