'libido-increasing' is a compound of 'libido' and 'increasing'. 'libido' originates from Latin, specifically the word 'libido', where 'libido' meant 'desire, lust'. 'increasing' derives from the verb 'increase', which originates from Latin 'increscere', where 'in-' meant 'into/toward' and 'crescere' meant 'to grow'.

'libido' entered English from Latin (kept as 'libido'), gaining modern psychological usage in the 19th–20th centuries (notably in psychoanalytic contexts). 'increscere' changed through Old French (e.g. 'croistre'/'encreistre') and Middle English forms (e.g. 'encrisen'/'increase') to become modern English 'increase', whose present participle is 'increasing'.

Initially, 'libido' meant 'desire' in Latin and 'increase' meant 'to grow'; combined in modern English the compound now specifically means 'causing an increase in sexual desire'.