The suffix -less means without. As in, "hopeless" which means without hope. So, "worthless" means without worth. Which is closest in definition to "unimportant." Other synonyms include "insignificant" and "useless." Additionally, "inexpensive" means not expensive; "homely" means unattractive, plain in appearance; "abrupt" means happening suddenly and unexpectedly; "materialistic" means overly worried about image, money and looks. Based on these words what do you think the prefixes un- and in- mean? 

The suffix -clud means close. As in "reclusive" which describes someone who likes to be closed indoors away from others. So, "conclude" means to bring to a close, to finish. Additionally, "commence" means begin; "beam" means smile widely; "harass" means annoy, irritate, pester, bother; "radiate" means emit, give off (energy).

The suffix -ful means full of. As in, "eventful" which means full of interesting events, busy. So, "frightful" means full of frights, scary. Additionally, "soothing" means calming; "combative" means eager to fight, argumentative; "snobbish" means elitist, thinking you are better than someone else; "doubtful" means not likely to happen, full of doubt.

The suffix -cide means kill. As in, "suicide" which means to kill oneself. So, "homicide" is to kill another person, murder. Additionally, a "villain" is the bad-guy in a story; "medicine" is what is used to treat diseases; a "legend" is a traditional story passed down over generations.

The prefix trans- means across, through and the suffix -mit means send. So, to "transmit" something means to send an idea from one person to another, to relay information, to communicate. Additionally, "replicate" means copy; "elevate" means raise to a higher level; "domesticate" means tame, make a wild animal into a pet; "aggregate" means a whole formed from the sum of multiple parts. 

The suffix -ance means in the process of. As in "maintenance" which means in the process of being maintained, fixed, and renovated. So, a "performance" is the process of performing or a show. Additionally, a "tribe" is a small group of people who have a unique culture and identity; the "cast" are the actors in a performance; a "script" is the writing used for performances, like in television or a play; a "voyage" is a journey, a movement from one place to another. 

The suffix -ize means to make into, to change. So, "sterilize" means to make sterile. "Sterile" means free from disease and dirt. This is closest in meaning to "clean." So, "sterilize" means to make something clean. Additionally, "improve" means make better; "surround" means to be all around something.