Seesaw a "teeter-totter". According to linguist Peter Trudgill, the term originates from the Nordic language word "tittermatorter". A "teeter-totter" may also refer to a two-person swing on a swing seat, on which two children sit facing each other and the teeter-totter swings back and forth in a pendulum motion. Both "teeter-totter" (from "teeter", as in "to teeter on the edge") and "seesaw" (from the verb "saw") demonstrate the linguistic process called reduplication, where a word or syllable is doubled, often with a different vowel. Reduplication is typical of words that indicate repeated activity, such as riding up and down on a
Playground on homemade playground equipment (primarily rope swings). From January 1990 to August 2000, CPSC received reports of 147 deaths to children younger than 15 that involved playground equipment. Girls were involved in a slightly higher percentage of injuries (55%) than were boys (45%). Injuries to the head and face accounted for 49% of injuries to children 0-4, while injuries to the arm and hand accounted for 49% of injuries to children ages 5–14. Approximately 15% of the injuries were classified as severe, with 3% requiring hospitalization. The most prevalent diagnoses were fractures (39%), lacerations (22%), contusions/abrasions (20%), strains/sprains (11%). For