"ill" 是一个 多义词，根据上下文的不同，它可以作为以下词性：

形容词

生病的：He was very ill.

坏的：an ill-intentioned person

邪恶的：an ill deed

不吉利的：an ill-fated day

名词

疾病：He has been suffering from an illness.

不幸：ill fortune

副词

不利地：He did ill in the exam.

恶劣地：The weather was ill on that day.

几乎不：I am almost ill.

建议根据具体的语境选择合适的词性。例如，在描述健康状况时，通常用形容词 "ill"；在讨论具体疾病时，则名词 "illness" 更为常见；在表达不利情况或评价时，副词 "ill" 更为适用。