unstable

They discovered that some of the pre-fusion F proteins appeared to be unstable and sometimes converted to an open form, or even less desirable, a post-fusion form.

“I like Trump, but he’s unstable. Who knows what he might do?” says the 74-year-old pensioner, whose name has been withheld.

Many players said the game's frame rate - which governs the smoothness of on-screen animations - was unstable.

The flooding in Valencia was caused by a Dana phenomenon - when warm, moist air meets cold air, creating an unstable weather system.

Antioxidants neutralize free radicals, which are unstable molecules that harm our cells.