Problem solving: Upper-intermediate Spanish vocabulary

6 Spanish words about problem solving at upper-intermediate level. Each entry links to the full meaning, a real example sentence, and usage notes written for English speakers.

• surgirverbto arise, to come up
• nudonounknot, crux
• buclenounloop — a repetitive sequence or cycle; also a curved shape
• navegarverbto navigate, to find one's way
• obstáculonounobstacle, barrier — something that blocks progress or makes achievement difficult
• resolververbto resolve, to solve