絶ぜつ縁えん抵てい抗こう

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Meanings

1

noun

insulation resistance

Technical term in electrical engineering; the electrical resistance of an insulating material.

discontinue, sever, cut off

縁affinity, relation, connection

抵resist, reach, touch

抗confront, resist, defy

絶ぜつ縁えん
Means 'insulation' or 'isolation'; 絶縁抵抗 is the resistance of that insulation.
抵てい抗こう
Means 'resistance' in general; 絶縁抵抗 specifies electrical resistance of an insulator.

Compound of 絶縁 (insulation) and 抵抗 (resistance).