unviable

由于缺乏市场需求，这个创业项目被认为不可行。

The startup project was considered ___unviable due to lack of market demand.

由于缺乏必要的营养，这个植物品种在干旱地区是无法存活的。

This plant species is ___unviable in arid regions due to lack of essential nutrients.