"Tomara" is an interjection to express desire. It isn't exactly a verb. It's a word derived from the verb "tomar" (to take) but it isn't used with this meaning. I think that the closer English word to "tomara" is "hopefully".

Tomara is very used to wish something to happen! Tomara que você aprenda Português rapidamente > May you learn Portuguese quickly It has no literal meaning to English since even in Portuguese it comes from the verb: Tomar (to take, to get and a lot of other meanings) first and third-person singular pluperfect indicative of tomar. Tomara que você tenha entendido as explicações: Hope you have understood the explanations.

Tomara, can mean when you are betting or you hope that some things come to happen. ex. I betting that you fall up from your bike because you´re not using a safety equipament. Tomara que você caia da sua bicicleta porque você não esta usando nenhum equipamento de segurança. Is rainning all the week, I hope that tomorrow shine. Esta chovendo a semana toda, tomara que amanhã faça sol.

'tomara... ' está muito próximo de: 'Eu espero...' Ex1. Tomara que que o tempo esteja bom. Espero que o tempo esteja bom. Ex2. Para roupas 'tomara que caia' é uma blusa sem alças.

In short, "Tomara" means "I hope..."