1 (gen) reaccionar how did she react? I didn't react quickly enough she didn't look up or react in any way
to react against sth/sb reaccionar contra algo/algn
he was reacting against Victorian traditions she was subconsciously making him react against her when they find out he was lying, they're going to react against him she reacted against the mindlessness and luxury of their lives my father never saved and perhaps I reacted against that to react [by] doing sth he reacted by throwing a tantrum
companies have reacted by increasing their prices la reacción de las empresas ha sido subir los precios; las empresas han reaccionado subiendo los precios
people fear the government may react by taking an even firmer line against political dissent foreign embassies have reacted by making plans to evacuate their nationals from the city
to react on sth/sb afectar algo/a algn; alcohol always reacted badly on him el alcohol siempre le afectaba negativamente; siempre tenía una reacción mala con el alcohol
lichens react on rocks the drug that reacts differently on different people
to react to [+news, situation] reaccionar ante; [+foreign substance] reaccionar a
employees reacted angrily to the news people react differently to stress the stock market has reacted positively to the budget certain patients react to canned foods my son reacted badly to the injection we were alarmed at the way in which Katie reacted to the drug someone allergic to milk is likely to react to cheese he reacted very badly to the radiation therapy
to react to sb reaccionar responder ante algn;or
he couldn't be sure how the horse would react to him they reacted [with] scepticism it's natural to react with disbelief if your child is accused of bullying
2 (Chem) (Fís) reaccionar;with con under normal circumstances, these two gases react readily to produce carbon dioxide and water
to react together tener una reacción conjunta; reaccionar conjuntamente
primitive organic molecules, created when simpler organic molecules reacted together to react [with] sth /calcium reacts with water/ but less violently than sodium and potassium do
