• 粘ねばる — to be sticky; to persist; to hang in there
• 粘着ねんちゃく — adhesion; being stuck fast
• 粘土ねんど — clay; modeling clay
• 粘度ねんど — viscosity; thickness of a liquid
• 粘ねばり強づよい — tenacious; persistent
• 粘々ねばねば — sticky; gooey; slimy
• 粘液ねんえき — mucus; viscous fluid
• 粘性ねんせい — viscosity; adhesive property

The kanji 粘 uses the rice radical 米 on the left, combined with a phonetic element that suggests both sound and the idea of “sticking.” From grains of rice that clump together, the character came to mean sticky, to cling, and by extension, to keep at something patiently.