Verb (5-dan, す, transitive)
1.  to grow long (e.g. hair, nails)
esp. 伸ばす
2.  to lengthen;  to extend;  to stretch
3.  to reach out;  to hold out
esp. 伸ばす
4.  to straighten;  to smooth out
5.  to spread evenly (dough, cream, etc.)
6.  to dilute;  to thin out
8.  to prolong
9.  to strengthen;  to develop;  to expand