10 most difficult words riddles

A tsunami is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions have the potential to generate a tsunami. The word originated in Japan, and is a combination of two words: tsu (which means "harbor") and nami (which means "wave").

Vexillology is the scientific study of the history, symbolism and usage of flags or, by extension, any interest in flags in general. A person who studies flags is a vexillologist, one who designs flags is a vexillographer, and the art of flag-designing is called vexillography.

The word consists of two kanji, "ju" meaning "gentle" (the same is used in "ju-jitsu", meaning "gentle skill") and "do" meaning "way" (also used in "aikido", often translated as "the Way of harmonious spirit").

Bismuth metal has been known since ancient times, although it was often confused with lead and tin, which share some physical properties. The etymology is uncertain, but possibly comes from Arabic bi ismid, meaning having the properties of antimony or the German words weiße Masse or Wismuth ("white mass"), translated in the mid-sixteenth century to New Latin bisemutum.

The sanguine person is optimistic, buoyant and hopeful. Historically, in the second century A.D., the physician Galen described four temperaments (melancholic, phlegmatic, sanguine and choleric) based upon the four humours or bodily fluids.

In Japan, it has long been common to provide musical entertainment at a dinner or a party. In 1971, Daisoki Inoue, a Japanese drummer musician, made a tape recorder-like machine that played songs for a 100-yen coin each - and leased them out so that the stores did not have to buy new songs on their own. Soon, new businesses called karaoke boxes, with compartmented rooms, became popular.

Cymru means Wales in the Welsh language.

The word consists of two kanji, "gei" meaning "art" and "sha" meaning "person" or "doer".

Karate developed from the indigenous martial arts of the Ryukyu Islands (called 'te' in Okinawan) under the influence of Chinese martial arts, particularly Fujian White Crane.

English word Bible comes from Latin biblia sacra "holy books". The plural "biblia" was often improperly interpreted as singular feminine, hence the old Anglo-Latin singular "biblia". The root "biblia" is shared with words such as bibliographer or bibliophilia, unrelated to the Bible.