Rethink

v. reconsider, give a subject second thought, contemplate again

Rethink is the largest severe mental illness charity in the UK. As of 2 July 2002 'Rethink' is the new operating name for the National Schizophrenia Fellowship.Rethink's mission statement is "Working together to help everyone affected by severe mental illness recover a better quality of life Take control and find a better way of living life to the full."Rethink were founded over 30 years ago to give a voice to people affected by severe mental illness and today, with over 8,300 members, they remain determined that this voice will continue to be heard. Rethink help over 48,000 people every year through their services, support groups and by providing information on mental health problems. There website receives almost 300,000 visitors every year.
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Noun
1. thinking again about a choice previously made; "he had second thoughts about his purchase"
(synonym) reconsideration, second thought, afterthought
(hypernym) reversal, change of mind, flip-flop, turnabout, turnaround
Verb
1. change one's mind; "He rethought his decision to take a vacation"
(hypernym) think, believe, consider, conceive
(hyponym) backpedal
(derivation) reconsideration, second thought, afterthought

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Repeatedly pushing and knocking.
Repeatedly weighing one's words. Referring to a person who racks his brain to find the right words in writing a sentence, or deliberates on a problem over and over again. Careful deliberation. Thinking something over and over.

     thinker