stiffen up
stiffen up · stiffens up · stiffened up · stiffening up
To become rigid, tense or stiffTo become rigid, tense or stiff.
» She stiffened up.
Forms
stiffens up, stiffening up, stiffened up, stiffened up| Base form | stiffen up · to stiffen up |
|---|---|
| 3rd person singular | stiffens up |
| Present participle | stiffening up |
| Past simple | stiffened up |
| Past participle | stiffened up |
irregular
Lessons for this word
3 lessons- A1Present simple — Because it is a verb
- A1Past simple, regular verbs — Because of its past form
- A2Phrasal verbs: introduction — Because it is a phrasal verb