.htaccess to host WordPress in a subdirectory. Some shared hosting won't let your primary domain be assigned to a subdirectory - this will help to get around that.

.htaccess

# replace <domainname> with your domain name
# replace <directoryname> with the name of the directory where WordPress is located

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{HTTP_HOST} ^(www.)?<domainname>.com$
RewriteCond %{REQUEST_URI} !^/<directoryname>/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /<directoryname>/$1
RewriteCond %{HTTP_HOST} ^(www.)?<domainname>.com$
RewriteRule ^(/)?$ <directoryname>/index.php [L] 
</IfModule>