1) Edged 2) Improved 3) Keen 4) Sharp 1) Fine-tuned 2) Gave a knife new life 3) Gave an edge 4) Gave an edge to 5) Got an edge on 6) Improved 7) Improved an edge 8) Keen edged 9) Made keen 10) Made more acute 11) Made more effective 12) Made sharp 13) Made sharper 14) Perfected 15) Perfected as a skill 16) Perfected over time 17) Perfected through practice 
• (imp. & p. p.) of Hone