Senses
一气儿/ 一氣兒 in one breath
continuously and without interruption; at one go; altogether
一气儿/ 一氣兒 of the same breed
being of the same kind or in league with each other, often used to imply that people are working together or share the same faults
一气儿/ 一氣兒 a while
a period of time; a stretch of time