Try this idea. When students ask about vocabulary, go through a three-step fun & educational method of learning new words.
I have a projector in my class, and I have a back-up wireless keyboard and mouse for the students. So I give one of them control of the board and ask him to:
1) Google the word and only look at the first couple of pages of image results. This sometimes works wonders and makes meanings clear when they can be explained with pictures.
For example, a student asked me about the difference between shed (n.) and shed (v.). So I asked him to look at the google image results for shed and shedding, and compare them. WOW it was clear in that example. (Try it!)
I have students today who remember this feature of my classes more than anything, and they remind me that they learned "delicate" from the pictures of the spider web, baby birds, snowflakes, and butterflies that came up in our google image search in class.
2) If the word's meaning is still not clear, then the next step is to look up synonyms for it, like on
www.thesaurus.com. This is a bit less fun, but still interesting enough to spend some time on it. Its really wonderful from an educational perspective to connect the meaning of a new word to a set of words that are already known. Out of the 20+ words that might come up as synonyms, maybe only 3 or 4 are known to the weaker students. They still have a chance to connect the meaning using those few words.
3) If that doesn't work, then we go to the traditional dictionary, online or printed. This just ensures that students actually know how to use dictionaries and do so regularly. I was shocked to find many TOEFL students did not know proper use of the dictionary!
This three-step vocab process can be used any time you have some time to play with in your class. Otherwise just tell them that delicate is fragile and move on! Let me know what you think.