limber
verb /ˈlɪmbə(r)/
  /ˈlɪmbər/
Word Originmid 16th cent. (as an adjective): perhaps from limber in the dialect sense ‘cart shaft’, with reference to the to-and-fro motion.
Verb Forms
 Phrasal Verbs| present simple I / you / we / they limber |    /ˈlɪmbə(r)/   /ˈlɪmbər/  | 
| he / she / it limbers |    /ˈlɪmbəz/   /ˈlɪmbərz/  | 
| past simple limbered |    /ˈlɪmbəd/   /ˈlɪmbərd/  | 
| past participle limbered |    /ˈlɪmbəd/   /ˈlɪmbərd/  | 
| -ing form limbering |    /ˈlɪmbərɪŋ/   /ˈlɪmbərɪŋ/  |