look(1bsd) (BSD System Compatibility)

look -- (BSD) find words in the system dictionary or lines in a sorted list

Synopsis

   /usr/ucb/look [-d] [-f] [-tc] string [file]

The look command consults a sorted file and prints all lines that begin with string.

If no file is specified, look uses /usr/ucblib/dict/words with collating sequence -df.

The following options are available:

-d: Dictionary order. Only letters, digits, TAB and <Space> characters are used in comparisons.
-f: Fold case. Upper case letters are not distinguished from lower case in comparisons.
-tc: Set termination character. All characters to the right of c in string are ignored.

grep(1), sort(1)