It's just plainer, nothing special is done to it.
Newer.
The superlative adjective is spelled freest (most free). Free drops an E in adding -er or -est).
carrier
Protector.
Plain is the correct spelling.
Newer.
The superlative adjective is spelled freest (most free). Free drops an E in adding -er or -est).
He has = Er hat
carrier
Protector.
Happier
Plain is the correct spelling.
Freer
Er
Sarah plain was elected govern-er
endoplasmic reticulum
exhilarating