sasvatih

śāśvatīḥ many; BG 6.41
śāśvatīḥ eternal; SB 1.18.11
śāśvatīḥ forever; SB 4.21.48
śāśvatīḥ practically eternally; SB 4.28.27
śāśvatīḥ samāḥ for many years; SB 9.14.19