1. impossible to understand or comprehend fully
2. impossible to hold or catch physically

Examples

• The concept of infinity remains ungraspable to most students.
• Her emotions were ungraspable, shifting like smoke in the wind.
• The philosopher discussed ungraspable truths about existence.
• The soap became ungraspable when wet and slippery.
• His dreams felt ungraspable upon waking.
• The meaning of the poem seemed ungraspable at first reading.