ˈfɔː(ɹ)sfəlnəs ˈfɔːteɪ ɪnˈtɛnsɪti ˈlɑːstɪŋnɪs ˈlæstɪŋnɪs pɜ(ɹ)ˈsweɪ.sɪv.nəs ˈpɒstʃə ˈpɑːstʃɚ ˌspɛʃiˈælɪti ˈspɛʃəlti stɹɛŋkθ the property of being physically or mentally strong fatigue sapped his strength capacity to produce strong physiological or chemical effects the toxin's potency the strength of the drinks physical energy or intensity he hit with all the force he could muster it was destroyed by the strength of the gale a government has not the vitality and forcefulness of a living man permanence by virtue of the power to resist stress or force they advertised the durability of their products the amount of energy transmitted (as by acoustic or electromagnetic radiation) he adjusted the intensity of the sound they measured the station's signal strength an asset of special worth or utility cooking is his forte the power to induce the taking of a course of action or the embracing of a point of view by means of argument or entreaty the strength of his argument settled the matter capability in terms of personnel and materiel that affect the capacity to fight a war we faced an army of great strength politicians have neglected our military posture the condition of financial success the strength of the company's stock in recent weeks