abiding; consistent-(ly); infallibly; never fail to; persevering (ly);persistent (ly); steadfast (ly); summer and winter unchanging; unfailing (ly); unswerving (ly)
❍ 我们将永远铭记他对我国人民的真诚而～的友谊。He will always be remembered by us for his sincerity and abiding friendship towards the Chinese people.
始终不渝
unswerving;unfailing;steadfast
对党对人民忠心耿耿～remain loyal and devoted to the Party and the people to the end of one’s life /～地支援各国人民的正义斗争steadfastly support and aid the people of all countries in their just struggles
始终不渝shǐ zhōnɡ bù yú
渝：改变。自始至终一直没有改变。consistent, as always, steady