Definition: Having many knots or difficult to untangle; also refers to something that is complex or hard to understand.

Example: The knotty problem took hours to solve.

Definition: A type of plant that belongs to the genus Polygonum, known for its jointed stems and small flowers.

Example: The gardener struggled to remove the knotweed from the flower bed because it grows so quickly.

Definition: A small bump or knot on a tree trunk, often caused by growth irregularities.

Example: The old oak tree had several knurs that made its trunk look unique.

Definition: Having many knots or twists; very twisted or tangled.

Example: The knurliest branches of the tree made it difficult to climb.

Definition: Having a twisted or knotty appearance, often referring to something that is rough or hard.

Example: The knurly branches of the old tree made it difficult to climb.

Definition: A type of tree native to Hawaii that has curved leaves and produces yellow flowers. Its wood is often used for making furniture and musical instruments.

Example: The craftsman chose koa wood to create a beautiful ukulele.

Definition: A type of tree-dwelling animal from Australia that has thick gray fur, big ears, and sharp claws, and mainly eats eucalyptus leaves.

Example: We saw a koala sleeping in a tree during our visit to Australia.

Definition: A type of bird known for its distinctive call, belonging to the cuckoo family and found in regions like Asia, Australia, and the Pacific.

Example: The koel is famous for its loud and melodious call during the breeding season.

Definition: A type of salmon that lives in lakes instead of the ocean, specifically a landlocked version of the sockeye salmon.

Example: The kokanee salmon are known for their bright red color during spawning season.

Definition: A type of mink found in northern Eurasia, known for its dark brown fur with tawny markings, or the fur itself.

Example: The artist preferred to use a kolinsky brush for its fine quality and smooth application of paint.