Avoid relative words.Relative words such as adequate,suitable,right,etc.do not specify the amount or degree that is required.For example,the relative word “suitable”in“select a suitable amount of the liquid”leaves the reader wondering exactly how much of the liquid to select for the purpose. Avoid ambiguity.The expression "computer trading"is ambiguous in that it could mean trading in computers,by computers,or even for computers. Another source of ambiguity are homonyms.Homonyms are words which are the same in sound and spelling but different in meaning.For example: Check undercarriage locking pin.If bent,replace. "replace"can mean substitute a new part for the undercarriage locking pin or put it back,even in the context.To avoid this ambiguity,it is desirable to choose the exact expression Other sources of ambiguity include pronouns,prepositions and clauses.For example, Please send us a catalog of the goods that you sell with pictures and prices. Is the writer asking for an illustrated catalog of all the goods his reader sells or the catalog of only those goods with pictures and prices?Another example: We sent the brochure to four local firms that had three-color illustrations. It would be clearer to revise it as:We sent the brochure that had three-color illustrations to four local firms. Be careful with technical words.Technical words may make instructions difficult to process.Sometimes,even apparently familiar words may create problems because they carry unusual meanings.For example,the word "tombstone"refers to a stone marker,usually with writing on it,on a tomb or grave.In the context of banking, however,it means a large press advertisement,usually for financial projects,with a hierarchy of inscriptions upon it relating to the importance of each participant's contribution.Readers who are not familiar with this may fail to get the message.To avoid this possible breakdown in communication,try to use more everyday language and define the technical words or "familiar"words carefully.Avoid relative words. Relative words such as adequate, suitable, right, etc. do not specify the amount or degree that is required. For example, the relative word “suitable” in “select a suitable amount of the liquid” leaves the reader wondering exactly how much of the liquid to select for the purpose. Avoid ambiguity. The expression “computer trading” is ambiguous in that it could mean trading in computers, by computers, or even for computers. Another source of ambiguity are homonyms. Homonyms are words which are the same in sound and spelling but different in meaning. For example: Check undercarriage locking pin. If bent, replace. “replace” can mean substitute a new part for the undercarriage locking pin or put it back, even in the context. To avoid this ambiguity, it is desirable to choose the exact expression. Other sources of ambiguity include pronouns, prepositions and clauses. For example, Please send us a catalog of the goods that you sell with pictures and prices. Is the writer asking for an illustrated catalog of all the goods his reader sells or the catalog of only those goods with pictures and prices? Another example: We sent the brochure to four local firms that had three-color illustrations. It would be clearer to revise it as: We sent the brochure that had three-color illustrations to four local firms. Be careful with technical words. Technical words may make instructions difficult to process. Sometimes, even apparently familiar words may create problems because they carry unusual meanings. For example, the word “tombstone” refers to a stone marker, usually with writing on it, on a tomb or grave. In the context of banking, however, it means a large press advertisement, usually for financial projects, with a hierarchy of inscriptions upon it relating to the importance of each participant’s contribution. Readers who are not familiar with this may fail to get the message. To avoid this possible breakdown in communication, try to use more everyday language and define the technical words or “familiar” words carefully