Present: 'grus LZ, TC. 'gru CD. Past: 'grus LZ, [CD], TC.grus CD. Future: 'grus LZ, TC. Imperative: 'grus LZ, TC. Voluntary: TC. Transitive: DS, TC. Characteristic Example: chos phyogs la LZ. Meaning: To bestow pains upon a thing CD. To persevere, to be diligent TC.