change state, turn – undergo a transformation or a change of position or action; “We turned from Socialism to Capitalism”; “The people turned against the President when he stole the election”
2.
ossify – make rigid and set into a conventional pattern; “rigidify the training schedule”; “ossified teaching methods”; “slogans petrify our thinking”
stiffen – make stiff or stiffer; “Stiffen the cream by adding gelatine”
3.
ossify – cause to become hard and bony; “The disease ossified the tissue”
alter, change, modify – cause to change; make different; cause a transformation; “The advent of the automobile may have altered the growth pattern of the city”; “The discussion has changed my thinking about the issue”