caulk
verb /kɔːk/
  /kɔːk/
 Verb Forms
| present simple I / you / we / they caulk |    /kɔːk/   /kɔːk/  | 
| he / she / it caulks |    /kɔːks/   /kɔːks/  | 
| past simple caulked |    /kɔːkt/   /kɔːkt/  | 
| past participle caulked |    /kɔːkt/   /kɔːkt/  | 
| -ing form caulking |    /ˈkɔːkɪŋ/   /ˈkɔːkɪŋ/  | 
- caulk something to fill the holes in something, especially a ship, with a substance that keeps out waterTopics Transport by waterc2Word Originlate Middle English (in the sense ‘copulate’, used of birds): from Old Northern French cauquer, caukier, variant of cauchier ‘tread, press with force’, from Latin calcare ‘tread’, from calx, calc- ‘heel’.