re = /(\d+)[^\d]*[^\w]some[wW]ord[^\w]/
str = '43434 of someword 12 anything 45 someword 2323 new someword
43434 of someWord 12 anything someWord 2323 new someWord
43434 of notsomeWord 12 anything someWordNotThis 2323 new notsomeWord
'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html