Verb (5-dan, る, transitive)
1. to knead; to thicken into a paste (stirring over a flame)
そこに水を加えて練っていく。Add water to it and knead it.
2. to polish (a plan, etc.); to refine; to elaborate; to work out
作戦を練ろうと思います。I think I will work out a plan.
3. to train; to drill; to exercise
空手の道場で毎日技を練っている。I hone my techniques at the karate dojo every day.
4. to gloss (silk); to soften; to degum
5. to tan (leather)
6. to temper (steel)
Verb (5-dan, る, intransitive)
7. to walk in procession; to parade; to march