Upright meaning
Need leaves little room to move. The poems say the naked freeze in the frost. Deal with what is essential first; the rest can wait.
Reversed (merkstave)
Nauðr looks the same either way up, so it has no reversed meaning. Read it upright every time.
A question to sit with
What do you actually need, as opposed to want, right now?
Its ætt
Nauðr belongs to Hagall's ætt, the runes of forces outside your control and the growth they force.