这些无根的年轻人经常在城市之间漂泊。

These ___rootless young people often drift from city to city.

他因为频繁搬家而感到自己无根无依。

He felt ___rootless due to moving frequently.

她的理论听起来很吸引人，但实际上缺乏任何可靠数据支持，根基不稳。

Her theory sounds appealing, but it's actually ___rootless without any solid data.