Amorous means showing or feeling sexual love. Amorous advances, an amorous mood, amorous glances.
It is slightly formal and often faintly comic now — amorous advances is the standard phrase and it usually introduces something unwelcome. The Latin amor means love, which is also behind amateur, one who does a thing for love.
1adjectiveamorousShowing or feeling sexual love.
“She pushed away his amorous advances and left the party early.”
amorous is a quality of love.
Latin amorosus comes from amor, love, from amare, to love. Amateur and amiable are relatives.
Latin
amor — love
Vulgar Latin
*amōrōsus
Old French
amoros
Middle English
amorous
English, today
amorous
Built from
From Middle English amorous, amerous (14th century), from Old French amoros, amoreus, from Vulgar Latin amōrōsus, from Latin amor (“love”), related to amāre (“to love”). Compare French amoureux (“in love”). a doublet of amoroso and amoureux.
Etymology from Wiktionary, CC BY-SA