problem

词形变化：

副词: probingly | 名词: prober | 动词过去式: probed | 动词过去分词: probed | 动词现在分词: probing | 动词第三人称单数: probes |

同义词：

puzzle | question | conundrum | issue | mystery | enigma | perplexity | difficulty | setback | hitch | drawback | glitch | challenge | poser | problematic | tricky | unruly | delinquent | knot | difficult | topic | text | exasperation | theme | paradox | pest | headache | complaint | crossing | subject | trouble | job | riddle | matter |

反义词：

solution |

词义辨析：

同义:

n.问题; 难理解的问题

issue

question

mystery

enigma

puzzle

perplexity

conundrum

同义参见:

knot

topic

theme

subject¹

headache

complaint

exasperation

pest

text

paradox

crossing

反义:

n.问题

solution

反义参见:

answer