Here are some ways to describe someone who is unflirty:
* Reserved: They are not comfortable with displays of affection or showing interest in others.
* Straightforward: They communicate their intentions clearly and directly, without any ambiguity or flirtation.
* Innocent: They may be naive or unaware of how their actions could be interpreted as flirtatious.
* Uninterested: They are not attracted to the person they are interacting with and have no desire to flirt.
Example:
"He was completely unflirty, just sitting there politely and talking about the weather."
It's important to note that "unflirty" is not necessarily a negative term. Some people simply prefer to keep things platonic and avoid flirting.