strengthen
UK: ˈstreŋθən | US: ˈstreŋθən
vt. to make or become stronger
vi. to grow in strength or effectiveness
The word "strengthen" combines the noun "strength" (derived from Old English strengþu, meaning "force" or "power") with the verb-forming suffix "-en," which indicates causation or transformation. This suffix, of Germanic origin, is used to convert adjectives or nouns into verbs (e.g., "soften," "lengthen"). The logical progression is straightforward: "strength" (existing state) + "-en" (action applied to that state) = "to make strong."
Exercise helps strengthen your muscles over time.
The new policy aims to strengthen economic ties between the two countries.
She took vitamins to strengthen her immune system.
The bridge was reinforced to strengthen its structure.
His encouraging words strengthened her resolve to continue.