VerbRoot-related objectMeaningFunction
تَخَتَّمَRingWearing itLibs
تَدَهَّنَOilApplying itTaʿammul
تَتَرَّسَShieldUsing itTaʿammul
تَخَيَّمَTentPitching itTaʿammul
Wearing is the defining point in the first example; putting a thing into practical use explains the others. Keeping these categories distinct helps explain the textbook's classification.