World War I had a significant impact on language from 1914 to 1918. New weapons like gas masks, trench mortars, and different types of planes led to new military terms. Medical knowledge advanced as injuries increased, and women took on new jobs as men fought. Rationing was implemented on the home front due to food shortages. Beyond war, scientific advancements in physics and psychology expanded terminology. Cinema and dances like the tango rose in popularity for entertainment.