Bold only part of a label of a short text element

I have a form where I want part of the label bolded and the rest normal text.  How do I do this?

This is how I want the label text to look like for each question.

However, once I hit the preview button and come back, the entire label text turns back into bold.  Please advise.

Hi,

I've checked your form and unfortunately, it's not possible to set a specific word to bold in the input field label. That can only be done on a Paragraph field, single choice field, and text box field. I tried looking for a custom CSS code that would do that, but unable to find any. 

You can try using a Paragraph for your header label and make it bold. 

Please see the image below.

I've added an additional Custom CSS code to adjust the spaces. 

Here's a working for you can clone: https://form.jotform.com/201565994232964

Let us know if you need further assistance.