1. finely sharpened, as an edge; so shaped as to cut or pierce substances readily: a keen razor.
2. sharp, piercing, or biting: a keen wind; keen satire.
3. characterized by strength and distinctness of perception; extremely sensitive or responsive: keen eyes; keen ears.
4. having or showing great mental penetration or acumen: keen reasoning; a keen mind.
5. animated by or showing strong feeling or desire: keen competition.
6. intense, as feeling
"senses can be keenly."
This list can help you learn new vocabulary more quickly and be able explore other words more easily.