Dictionary Definition:
śak cl. 5.P. (cf. Dhātup.xxvll, 15) śaknoti (pf. śaśā́ka, śekúḥ RV. &c. &c
• aor áśakat AV. &c. [Ved. also Pot. śakeyam and śakyām
• Impv. śagdhi, śaktam]
• fut. śaktā, or śakitā Gr. [Page 1044, Column 2]
• śakṣyati, ○te Br. &c
• śakiṣyate, ○te Gr
• inf. -śaktave RV.
• śaktum or śakitum Gr.), to be strong or powerful, be able to or capable of or competent for (with acc., dat. or loc., rarely acc. of a verbal noun, or with an inf. in am or tum
• or with pr. p
• e.g. with grahaṇāya or grahaṇe, 'to be able to seize'
• vadha-nirṇekam a-śaknuvan, 'unable to atone for slaughter'
• śakéma vājíno yámam, 'may we be able to guide horses'
• vii7kṣitum na śaknoti, 'he is not able to see'
• pūrayan na śaknoti, 'he is not able to fill') RV. &c. &c. (in these meanings ep. also śakyati, ○te, with inf in tuṃ cf. Dhātup. xxvi, 78)
• to be strong or exert one's self for another (dat.), aid, help, assist RV. vii, 67, 5 ; 68, 8 &c
• to help to (dat. of thing) ib. ii, 2, 12 ; iv, 21, 10 &c.: Pass. śakyate (ep. also ○ti), to be overcome or subdued, succumb MBh.
• to yield, give way ib.
• to be compelled or caused by any one (instr.) to (inf.) ib.
• to be able or capable or possible or practicable (with an inf. in pass. sense, e.g. tat kartuṃ śakyate, 'that can be done'
• sometimes with pass. p., e.g. na śakyate vāryamāṇaḥ, 'he cannot be restrained'
• or used impers., with or with out instr., e.g. yadi [tvayā] śakyate, 'if it can be done by thee', if it is possible') Mn. MBh. &c.: Caus. śākayati (aor. aśīśakat), Gr.: Desid., √śikṣ. [Cf., accord. to some, Gk. ?, ?, ?, Germ.ḥag ḥecke [1044, 2] hegen ; behagen.]