luxuriant

1. ADJ Luxuriant plants, trees, and gardens are large, healthy, and growing well. (植木、花园等)茂密的; 茂盛的; 葱茏的[usu ADJ n]

There were two very large oak trees in front of our house with wide spreading branches and luxuriant foliage. 那时我们家门口有两棵枝广叶茂的大橡树。

2. ADJ If you describe someone's hair as luxuriant, you mean that it is very thick and healthy. (须发)浓密的; 健康的

Hair that's thick and luxuriant needs regular trimming. 健康浓密的头发需要定期修剪。