1. at all costs - Adverb
2. at all costs - Phrase
regardless of the cost involved
Source: WordNetPeace if possible. Truth at all costs. Martin Luther
Having once decided to achieve a certain task, achieve it at all costs of tedium and distaste. The gain in self confidence of having accomplished a tiresome labor is immense. Arthur Helps
Avoid at all costs that vile spew you see rotting in oil in screwtop jars. Too lazy to peel fresh? You don't deserve to eat garlic. Anthony Bourdain
And, having once decided to achieve a certain task, achieve it at all costs of tedium and distaste. The gain in self-confidence of having accomplished a tiresome labour is immense. Arnold Bennett
India wants to avoid a war at all costs but it is not a one-sided affair, you cannot shake hands with a clenched fist. Indira Gandhi
It is [a politician's] business to get and hold his job at all costs. If he can hold it by lying, he will hold it by lying; if lying peters out, he will try to hold it by embracing new truths. His ear is ever close to the ground. H. L. Mencken