棘 gik¹ {jí}

thorns

棘手 gik¹ sau² {jí shǒu}

difficult

棘楚 gik¹ co² {jí chǔ}

1. thorny problem
2. troublesome affair

棘輪〔-轮〕 gik¹ leon⁴ {jí lún}

ratchet

棘手 gik¹ sau² {jí shǒu}

1. thorny (problem)
2. intractable

棘皮動物〔--动-〕 gik¹ pei⁴ dung⁶ mat⁶ {jí pí dòng wù}

echinoderm, the phylum containing sea urchins, sea cucumbers etc

棘鼻青島龍〔---岛龙〕 gik¹ bei⁶ cing¹ dou² lung⁴ {jí bí Qīng dǎo lóng}

Tsintaosaurus spinorhinus, a 10 meter long hadrosaur with a single horn on its duck-billed snout