Which word matches the definition: 'To be left and right handed at the same time.'?

Which word matches the definition: 'To make something better by adding to it.'?

Which word matches the definition: 'Lacking something.'?

Which word matches the definition: 'To bring into action.'?

Which word matches the definition: 'Relentless, severe, stern, or gloomy in manner or appearance.'?

Which word matches the definition: 'Courage in pain or adversity.'?

Which word matches the definition: 'To be or become wide open.'?

Which word matches the definition: 'An insulting or mocking remark; a taunt.'?

Which word matches the definition: 'An external form, appearance, or manner of presentation, typically concealing the true nature of something.'?

Which word matches the definition: 'Proceeding in a gradual way, but with harmful effects.'?

Which word matches the definition: 'An indication or hint.'?

Which word matches the definition: 'Ostentatiously rich and luxurious or lavish.'?

Which word matches the definition: 'Easily bent or flexible.'?

Which word matches the definition: 'To say something again or several times for clarity or emphasis.'?

Which word matches the definition: '(of a person) calm, dependable, and showing little emotion or animation.'?

Which word matches the definition: 'Not certain or fixed; provisional.'?

Which word matches the definition: 'Having an untidy or disheveled appearance.'?

Which word matches the definition: 'In exactly the same words as were used originally.'?

Which word matches the definition: 'Cautiously; carefully.'?