Upright meaning
Need and constraint. The friction you feel is teaching you what really matters. Patience and resourcefulness will carry you.
Reversed (merkstave)
Nauthiz 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 truly need, as opposed to what you want?
Its ætt
Nauthiz belongs to Heimdall's ætt, the runes of forces outside your control and the growth they force.