Get an English Tutor
English word strengthen comes from English -en, English strength
-en (English)
(dialectal, or, non-standard, rare) Used to form the plural of nouns. Can be used to denote the plural form of a small number of English words, the majority of whose etymology goes back to the n-stem (i.e. weak noun) declension of Germanic languages. Used to form the diminutives of certain nouns. When attached to certain adjectives, it forms a transitive verb whose meaning is, to make [...]
strength (English)
(obsolete) A strong place; a stronghold.. A positive attribute.. The intensity of a force or power; potency.. The quality or degree of being strong.. The strongest part of something; that on which confidence or reliance is based. (obsolete) To give strength to; to strengthen. [12th-17th c.].
strengthen (English)
(intransitive) To grow strong or stronger.. (transitive) To animate; to give moral strength to; to encourage; to fix in resolution; to hearten.. (transitive) To augment; to improve; to intensify.. (transitive) To make strong or stronger; to add strength to; to increase the strength of; to fortify; to reinforce.