Слово встречается в следующем контексте:
Out of the oil-smooth spirit of the last two decades of the 19th cent.

Заранее спасибо

Out of the oil-smooth spirit of the two last decades of the nineteenth century, suddenly, throughout Europe, there rose a kindling fever. Nobody knew exactly what was on the way; nobody was able to say whether it was to be a newart, a New Man, a new morality or perhaps a reshuffling of society.

имхо: скучные/монотонные/спокойные/тусклые (невероятно ... до одури/отвращения (последнее, правда, для смелых людей) два последних десятилетия