乍ながら

1. 1while ; during ; as
2. 2while ; although ; though ; despite ; in spite of ; notwithstanding
3. 3all ; both
4. 4as (e.g. "as always", "as long ago") ; in (e.g. "in tears")
5. 5while doing something else (at the same time)

JMdict entry 1459640 · frequency rank 50. Source and licence.