Learn Portuguese (Portugal): Mesmo ofegantes, nós ignorámos a cãibra.

Instead of using a full clause with a subjunctive verb, like Mesmo que estivéssemos ofegantes (Even though we were panting), you can attach Mesmo directly to an adjective. This creates a concise concessive phrase, similar to saying 'Even panting' in English.

Why is ofegantes in the plural if there is no verb connecting it to the subject?

Even in a verbless phrase, the adjective still directly modifies the subject of the main clause (nós). Because nós is plural, ofegantes must also agree in number and be plural to match it.

Why does ignorámos have an accent mark?

In European Portuguese, regular -ar verbs take an acute accent in the first-person plural of the past tense (nós ignorámos). This gives the 'a' an open sound, distinguishing the past tense from the present tense (nós ignoramos), which is pronounced with a closed 'a' and has no accent.