Less / least

Note that when we are making the not-so-much comparison, less and least are the only options open to us, unless we use the construction not as…as:

• I'm not as hungry today as I was yesterday.
• I am less hungry today than I was yesterday.
• I was angriest with John about the spoilt weekend. I'm less angry with you. But I'm still angry, nevertheless.
• Why don't you sit here? This is the least uncomfortable of our chairs.
  Note that we tend not to use less and least to form comparatives / superlatives with one syllable adjectives, as short adjectives often have other words as their opposites. Compare the following:
• Your cooking is less bland than Mary's. - Your cooking is spicier than Mary's.
• It's less warm today, don't you think? - It's cooler today, don't you think?