Onomatopoeia is the use or creation of a word that phonetically imitates, resembles, or suggests the sound that it describes. Such a word itself is also called an onomatopoeia. Common onomatopoeias include animal noises such as oink, meow (or miaow), roar, and chirp. Onomatopoeia can differ by language: it conforms to some extent to the broader linguistic system; hence the sound of a clock may be expressed as tick tock in English, tic tac in Spanish and Italian (shown in the picture), in Mandarin, kachi kachi in Japanese, or tik-tik in Hindi.
The English term comes from the Ancient Greek compound onomatopoeia, 'name-making', composed of onomato- 'name' and -poeia 'making'. Thus, words that imitate sounds can be said to be onomatopoeic or onomatopoetic.
In the case of a frog croaking, the spelling may vary because different frog species around the world make different sounds: Ancient Greek brekekekex koax koax (only in Aristophanes' comic play The Frogs) probably for marsh frogs; English ribbit for species of frog found in North America; English verb croak for the common frog.
Some other very common English-language examples are hiccup, zoom, bang, beep, moo, and splash. Machines and their sounds are also often described with onomatopoeia: honk or beep-beep for the horn of an automobile, and vroom or brum for the engine. In speaking of a mishap involving an audible arcing of electricity, the word zap is often used (and its use has been extended to describe non-auditory effects of interference).
Human sounds sometimes provide instances of onomatopoeia, as when mwah is used to represent a kiss.
For animal sounds, words like quack (duck), moo (cow), bark or woof (dog), roar (lion), meow/miaow or purr (cat), cluck (chicken) and baa (sheep) are typically used in English (both as nouns and as verbs).
Some languages flexibly integrate onomatopoeic words into their structure. This may evolve into a new word, up to the point that the process is no longer recognized as onomatopoeia.