whir
verb /wɜː(r)/
  /wɜːr/
(also whirr)
 [intransitive]Verb Forms
| present simple I / you / we / they whir |    /wɜː(r)/   /wɜːr/  | 
| he / she / it whirs |    /wɜːz/   /wɜːrz/  | 
| past simple whirred |    /wɜːd/   /wɜːrd/  | 
| past participle whirred |    /wɜːd/   /wɜːrd/  | 
| -ing form whirring |    /ˈwɜːrɪŋ/   /ˈwɜːrɪŋ/  | 
- to make a continuous, low sound like the parts of a machine moving
- The clock began to whir before striking the hour.
 - Three large fans whirred overhead in the afternoon heat.
 
Oxford Collocations DictionaryWhirr is used with these nouns as the subject:- machine
 
Word Originlate Middle English (in the sense ‘move with a whirring sound’): probably of Scandinavian origin; compare with whirl.