stiffen

Definition of Stiffen in English :

1. stiffen

become stiff or stiffer

Example Sentences:
'He stiffened when he saw his boss enter the room'

2. stiffen

make stiff or stiffer

Example Sentences:
'Stiffen the cream by adding gelatine'

restrict

Example Sentences:
'Tighten the rules'
'stiffen the regulations'

WordNet Lexical Database for English. Princeton University. 2010.

Stiffen

verb

1.

to make or become stiff or stiffer

2. (intransitive)

to become suddenly tense or unyielding

verb transitive, verb intransitive

to make or become stiff or stiffer

tr. & intr.v. stiff·ened, stiff·en·ing, stiff·ens

To make or become stiff or stiffer.