The spelling of the phrase "fall knees" can be explained using IPA phonetic transcription. In IPA, "fall" is pronounced /fɔːl/, with the "a" sound pronounced like "aw" in "saw". "Knees" is pronounced /niːz/, with the "ee" sound pronounced like "ea" in "seat". Therefore, the spelling of the full phrase would be /fɔːl niːz/. This phrase references the act of falling on one's knees, which can be a sign of surrender, prayer, or physical injury.