The re- part of regain is a prefix.
do it again exampel "redo the dishes"
Re- is the prefix of back or again. Some other words for this are revise, report, regain, realign, etc.
regain
Odysseus regain .............................
Ohio's regain is East.
She needs to regain her strength.
Regain Records was created in 1997.
Regain is one whole word, re-gain.
He went to drama classes, to try and regain his confidence.
moisture regain of cotton is 14-15%
regainrehab-dot-com
Prefix=IN