Unrealized loss isn't the same as depreciation, although the latter causes the former.
Unrealized loss refers to the situation of an asset that has dropped in value relative to the purchase price. Two investors can hold the same asset, one with an unrealized loss and the other with an unrealized gain.
Depreciation, on the other hand, refers to the asset itself compared to its previous or historical value, depending on the timeframe of the analysis.
So, you can't say that what generates the cause is the cause under a different name.
Unrealized loss or gain sits in your portfolio, stemming from choices and market movements, defined by the price at which the asset was bought and its current value during the analysis.
An unrealized loss doesn't mean a loss until you decide to sell the asset, or if it truly can't recover or has lost interest among the majority of investors who once held it.
So, while you have an unrealized loss, there's hope because it might appreciate again.